marfan syndrome is a dominant trait. a cross between a homozygous dominant and a heterozygote would produce what phenotypic ratio? group of answer choices 3:1 1:3 1:2:1 2:2 4:0
Answers
Marfan syndrome is caused by a dominant allele. When a homozygous dominant individual (MM) is crossed with a heterozygous individual (Mm), the possible genotypes and phenotypes of the offspring can be predicted using a Punnett square:
M M
M MM MM
m Mm Mm
In this cross, all offspring will inherit one M allele from the homozygous dominant parent and one M allele from the heterozygous parent. Therefore, all offspring will be heterozygous for Marfan syndrome and express the phenotype associated with the disorder.
The phenotypic ratio of the offspring will be 4:0, which means that all offspring will have the same phenotype, namely Marfan syndrome.
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Since Marfan syndrome is a dominant trait, a homozygous dominant individual would have two copies of the dominant allele, while a heterozygote would have one copy of the dominant allele and one copy of the recessive allele.
Therefore, when crossing a homozygous dominant (AA) with a heterozygote (Aa), we would get the following Punnett square:
| | A | A |
| --- | --- | --- |
| A | AA | AA |
| a | Aa | Aa |
As you can see, all of the offspring would have at least one copy of the dominant allele, and thus all would exhibit the Marfan syndrome phenotype. The phenotypic ratio would be 4:0, meaning all offspring would show the Marfan syndrome trait.
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Related Questions
Smart people answer this this is emt question
Answers
Answer:
respitory
Explanation:
minors or actual from the parents
diagnosis of paramyxoviruses is aided by viewing a or a multinucleate giant cell with cytoplasmic inclusion bodies. multiple choice question.
Answers
Diagnosis of paramyxoviruses is aided by viewing a syncytium or a multinucleate giant cell with cytoplasmic inclusion bodies .
A huge, cell-like structure known as a syncytium is created when two or more cells come together.
The order Mononegavirales contains the family of negative-strand RNA viruses known as Paramyxoviridae. Natural hosts are vertebrates. Measles, mumps, and respiratory tract infections are among the illnesses connected to this family.
By isolating the virus from swabs (oropharyngeal and/or cloacal), serology, or PCR testing, paramyxovirus can be identified. There is just supportive care available for paramyxovirus infection. Some viruses may give some persons transient conjunctivitis and flu-like symptoms.
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Why is it that you cannot fetch water with a basket?
Answers
Answer:
cuz youd look weird with water in a basket
Explanation:
only you have that kind of idea
For expression of recessive traits such as blue eyes, the pairing of alleles at the gene locus for the trait must be?
Answers
For the expression of recessive traits such as blue eyes, the pairing of alleles at the gene locus for the trait must be homozygous.
Traits are inherited characteristics that distinguish one individual from another. These traits are passed down through DNA. Humans have two sets of chromosomes. These chromosomes carry genes that determine your characteristics. We inherit a copy of each gene from our parents. These genes come in different forms, called alleles.
The alleles can be dominant or recessive. Dominant alleles are expressed when paired with either a recessive or a dominant allele. Recessive alleles, on the other hand, are only expressed when paired with another recessive allele. If one dominant allele and one recessive allele are present, the dominant allele will be expressed. To express a recessive trait, both alleles must be recessive.
Therefore, for the expression of recessive traits such as blue eyes, the pairing of alleles at the gene locus for the trait must be homozygous.
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The ______ is a particularly sensitive region of the retina on which focused images are automatically centered. A.) cornea. B.) fovea. C.) iris. D.) pupil.
Answers
The B) fovea is a particularly sensitive region of the retina on which focused images are automatically centered.
The retina is the layer of tissue located at the back of the eye that contains photoreceptor cells (rods and cones) that detect light and transmit visual signals to the brain. The fovea is a small, specialized region located in the center of the macula, which is a part of the retina.
The cones in the fovea are responsible for producing sharp, detailed, and color vision, which makes it the most sensitive part of the retina. The fovea is also responsible for our ability to see fine detail, like reading and recognizing faces, as well as for our ability to perceive color.
When we focus our eyes on something, the focused image is automatically centered on the fovea. This enables the fovea to produce a clear and precise visual image, while other areas of the retina are responsible for detecting the surrounding peripheral visual information.
The fovea is a particularly sensitive region of the retina on which focused images are automatically centered, making it essential for our ability to see fine detail and color. The answer is option B.
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state 2 main distinguishing characteristics of Rhizobium
Answers
Answer:
i know only one
Explanation:
rhizobium foun in the root of legumonus plant like pea and this help to plant grow
rhizobim convert nitrogen into nitrates during thunderstorm
She finds that the organism is unicellular and has a nucleus, a cell wall, and the ability to produce spores. What kingdom does the organism belong to?
Answers
Based on the characteristics mentioned, the organism that is unicellular and has a nucleus, a cell wall, and the ability to produce spores belongs to the Fungi Kingdom.
Fungi are a diverse group of organisms that are classified as neither animals nor plants. They are often referred to as a separate kingdom known as the Fungi Kingdom.
Fungi, like plants, have a cell wall, but it is made up of chitin, not cellulose like plants. Fungi also differ from plants in that they are heterotrophic, meaning they must obtain nutrients from other organisms.
Fungi can exist in various forms and sizes. Some fungi are unicellular, such as yeast, while others are multicellular, such as mushrooms. They are an important part of the ecosystem and play a vital role in nutrient cycling by breaking down organic matter and recycling nutrients back into the soil.
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Epithelial tissue described as many layers of thin flat cells is classified as
Stratified
Simple
Transitional
Squamous
Pseudostratified
Cuboidal
Columnar
Answers
Epithelial tissue described as many layers of thin flat cells is classified as stratified tissue.
What are epithelial tissue?
Epithelial tissue are widespread amongst the body. They form the covering of a body surface. Epithelium tissue is found in variety of functions such as protection, excretion, filtration and diffusion.
Epithelial tissue are of different types : Cuboidal, columnar and squamous. Simple cuboidal epithelium is found in glandular tissue and in kidney tubules.
Pseudostratified epithelium is found in respiratory tracts and the male reproductive tract. Glandular epithelium is specilized to produce and secrete substance. Squamous epithelium is flattened, polygonal tissue found in the skin tissue.
Therefore, Epithelial tissue described as many layers of thin flat cells is classified as stratified tissue.
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during cellular respiration the energy in glucose is used to manufacture glucose. is released all at once. is stored and carried by electrons. becomes stored in molecules of water.
Answers
During cellular respiration the energy in glucose is stored and carried by electrons
What is Cellular respiration ?A glucose molecule gradually degrades into water and carbon dioxide during cellular respiration. During the process of transforming glucose, some ATP is created immediately. However, oxidative phosphorylation, a process, results in the production of significantly more ATP.
In order to get chemical energy for cellular processes, organisms require oxygen to break down food molecules during cellular respiration. In addition to algae and other protists, cellular respiration also occurs in the cells of animals, plants, and fungus.The activity is known as "cellular respiration" because the cell seems to "respire" by consuming molecular oxygen (as an electron acceptor) and exhaling carbon dioxide (as an end product).Learn more about Cellular respiration here:
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Q.18. During which period did the first trilobites appear?
a) Cambrian
b) Devonian
c) Silurian
d) Ordovician
Answers
Answer:
a) cambrian
Explanation:
The first body fossils of trilobites appeared in the Early Cambrian Period, about 540 million years ago.
Answer:
A. Cambrian period
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Which instrument would be best for measuring mass? *
O Scale that measures grams
O A Flask
O Scale that measures pounds
O A graduated Cylinder
O Measuring tape
Answers
Answer:
Scale that measure pounds
Answer:
Scale that measures grams.
Explanation:
A scientific _______ is an explanation based on many observations by many different researchers.
A scientific _______ is usually an explanation based on one observation by one researcher.
A.
theory; hypothesis
B.
deduction; inference
C.
hypothesis; theory
D.
inference; deduction
Answers
D is the answer
Inference is derived from many or different point of views while a deduction can be gotten or subtracted by one individual or researcher.
which population had the greatest density?
Answers
Answer:
China
Explanation:
it has greatest/highest density
Why are the strands of DNA said to be anit-parallel?
Answers
Answer:
hope it helps...
Explanation:
DNA replication
The nucleic acid sequences are complementary and parallel, but they go in opposite directions, hence the antiparallel designation. The antiparallel structure of DNA is important in DNA replication because it replicates the leading strand one way and the lagging strand the other way.
1. Complete a dichotomous key for the 10 leaves on the Common Leaves sheet. The chart provided here allows for 11 pairs of statements. Depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.
Statement Types/Dichotomous key for leaves Identification Name/Number of Leaves
Statement 1a Click or tap here to enter text.
go to statement or identify leaf Click or tap here to enter text.
Statement 1b Click or tap here to enter text.
go to statement or identify leaf Click or tap here to enter text.
Answers
This dichotomous key should help you identify the leaves on the Common Leaves sheet by asking a series of yes/no questions and directing you to the appropriate leaf based on your answers.
Sure! Here's a dichotomous key for the 10 leaves on the Common Leaves sheet:
1a. Leaves are needle-like or scale-like (go to Statement 2)
1b. Leaves are not needle-like or scale-like (go to Statement 3)
2a. Leaves are arranged in clusters (go to Statement 4)
2b. Leaves are not arranged in clusters (go to Statement 5)
3a. Leaves are broad and flat (go to Statement 6)
3b. Leaves are not broad and flat (go to Statement 7)
4a. Clusters of leaves have 2 needles (go to Leaf 1)
4b. Clusters of leaves have more than 2 needles (go to Leaf 2)
5a. Leaves are feathery and fern-like (go to Leaf 3)
5b. Leaves are not feathery and fern-like (go to Statement 8)
6a. Leaves are heart-shaped (go to Leaf 4)
6b. Leaves are not heart-shaped (go to Statement 9)
7a. Leaves have a sawtooth edge (go to Leaf 5)
7b. Leaves do not have a sawtooth edge (go to Statement 10)
8a. Leaves have rounded lobes (go to Leaf 6)
8b. Leaves do not have rounded lobes (go to Statement 11)
9a. Leaves have a waxy texture (go to Leaf 7)
9b. Leaves do not have a waxy texture (go to Leaf 8)
10a. Leaves have deeply cut lobes (go to Leaf 9)
10b. Leaves do not have deeply cut lobes (go to Leaf 10)
Leaf 1: White Pine
Leaf 2: Red Pine
Leaf 3: Maidenhair Fern
Leaf 4: Sweetgum
Leaf 5: Red Maple
Leaf 6: Sugar Maple
Leaf 7: Magnolia
Leaf 8: Dogwood
Leaf 9: Oak
Leaf 10: Ginkgo
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an organism physical it its
Answers
Answer: an individual animal, plant, or single-celled life form.
Explanation:
"fish and other organisms have been destroyed over large areas of the creek"
how does renewable energy affect non-human organisms? (plants, animals, bacteria, fungi,etc.)
Answers
Answer:
Non Renewable Energy Impact on Environment
All energy sources have some impact on our environment. Fossil fuels—coal, oil, and natural gas—do substantially more harm than renewable energy sources by most measures, including air and water pollution, damage to public health, wildlife and habitat loss, water use, land use, and global warming emissions.
Explanation:
WHAT AARE UNICELLULAR ORGANISM
Answers
Answer:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism
Answer:
A unicellular organism, sometimes known as a single-celled organism, is a single-cell creature, as opposed to a multicellular organism, which has many cells. Prokaryotic organisms and eukaryotic organisms are the two types of unicellular creatures.
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have a great day!
in the modern world many countries with kings or queens have enolved into constitutional democracies, monarchs are mostly?
.
Answers
In the modern world, many countries with kings or queens have evolved into constitutional democracies, and the role of the monarch has evolved over time from that of a politically important figure to one that is more symbolic and ceremonial.
What is the significance of the monarchy?The monarchy is limited by a written constitution, the principle of the rule of law in the modern world, and representing the country at official events and ceremonies, which vary from country to country.
Hence, in the modern world, many countries with kings or queens have evolved into constitutional democracies, and the role of the monarch has evolved over time from that of a politically important figure to one that is more symbolic and ceremonial.
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What is a pathway in which glucose is oxidized to pyruvic acid called?
Answers
Answer:
B
Explanation:
Glycolysis
A student is investigating the strength of electromagnets she created using batteries, wire, and nails.
She uses two different-sized nails and varies the number of coils of wire around the nail to determine how many paper clips each configuration can lift. She makes a data table of the results.
The student hypothesizes that the number of coils has a cause-and-effect relationship on the strength of the magnetic devices she made. Which would be the best way for the student to test the devices to be sure that her hypothesis is accurate?
Answers
Explanation:
You will change two variables to make different electromagnets: the number of wire coils around the nail (10 or 20) and the number of D cell batteries.
there si a roller coaster car at te top of the hill , one at the middle of the hill , and one at the bottom of the hill which has the most potential energy
A) THE CAR AT THE BOTTOM OF THE HILL
B) THE CAR IN THE MIDDLE OF THE HILL
C) THE CAR AT THE TOP OF THE HILL
D) ALL OF THE CARS HAVE ZERO POTENTIAL ENERGY
Answers
Answer:the car at the top of the hill
Explanation: it has the most potential energy. If it is sitting still, it has no kinetic energy. As the car begins to roll down the hill, it loses potential energy, but gains kinetic energy.
Which of the following statements BEST outlines why the coral reefs in the Caribbean are at risk?
a) There has been overfishing of invasive species
b) The Caribbean is a popular tourist destination
c) There have been many hurricanes in the Caribbean
d) There has been a decrease in the volume of sewage flowing into the reefs
Answers
Answer:
j5tj th hr rg eg eg ry rh gr df un j
Explanation:
r h h5 h5
Answer:
b) The Caribbean is a popular tourist destination
How can I identify an organelle? Please help I have till 11:59 to answer this question.
Answers
Answer:
Shape and size?
Explanation:
about 70% of americans perceive a bitter taste from the chemical phenylthiocarbamide (ptc). the ability to taste this chemical, results from a dominant allele (t) and not being able to taste ptc is the result of having two recessive alleles (t). albinism is also a single locus (influenced by one gene) trait with patients displaying a lack of pigment. the allele for normal pigment is dominant (a) and the allele for lack of pigment is recessive (a). a normally pigmented woman who cannot taste ptc has a father who is an albino taster. she marries a homozygous, normally pigmented man who is a taster but who has a mother that does not taste ptc. a. what are the possible genotypes of their future children? b. what percentage of the children will be albinos? c. what percentage of the children will be non-tasters of ptc?
Answers
a) The possible genotypes of their future children are: TTAa, TTaa, aaTt, AaTt, Aatt
b) The percentage of the children that will be albinos is 25% (1 out of 4).
c) The percentage of the children that will be non-tasters of PTC is 50% (2 out of 4).
a) The father of the normally pigmented woman is an albino taster, so he has the genotype aaTt (homozygous recessive for pigment and heterozygous for PTC tasting ability). The normally pigmented woman who cannot taste PTC is TtAa (heterozygous for both traits).
The homozygous, normally pigmented man who is a taster but whose mother does not taste PTC is TTAa (homozygous dominant for pigment and heterozygous for PTC tasting ability). Therefore, the possible genotypes of their future children are:
TTAa (normally pigmented, taster, heterozygous for both traits)TTaa (normally pigmented, non-taster, homozygous dominant for pigment)aaTt (albino, taster, homozygous recessive for pigment, heterozygous for PTC tasting ability)AaTt (normally pigmented, taster, heterozygous for both traits)Aatt (normally pigmented, non-taster, homozygous recessive for PTC tasting ability, heterozygous for pigment)b) The percentage of the children that will be albinos is 25% (1 out of 4). This is because the only way for a child to be an albino is to inherit two recessive alleles for pigment (aa) from their parents, and one of the parents (the father) is homozygous recessive for pigment.
c) The percentage of the children that will be non-tasters of PTC is 50% (2 out of 4). This is because the father is heterozygous for PTC tasting ability (Tt), and the mother is heterozygous as well (Tt), so there is a 25% chance of the child inheriting two recessive alleles for PTC tasting ability (tt) and being a non-taster.
Overall, the possible genotypes of their future children are dependent on the inheritance of alleles for two traits - pigment and PTC tasting ability - that are controlled by separate genes. The Punnett square can be used to help determine the possible genotypes and phenotypes of the offspring based on the genotypes of their parents.
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I need help , thank youu
Answers
Answer:
the structural layers of earth are - the crust, the mantle, the outer core, and the inner core.
Which term describes the relationship in which one organism lives inside the other one. Check ih correct answer
Answers
Answer:
The term that describes the relationship in which one organism lives inside the other one is endosymbiosis.
Explanation:
Explain how to use a Punnett square to determine the probability of inheriting traits.
A Punnett square is a graphical representation that uses the traits of the parents to predict the probability of the possible traits-and genes of their offspring. It allows the traits from each parent to be combined in ____________- format to show all the __________and _______________possibilities the offspring may inherit.
Answers
Answer:
2 x 2
dominant
recessive
The process of calving produces? baby steers. icebergs. roche moutonnee. moraines. nunataks.
Answers
The process of calving produces icebergs.
Calving is a natural process that occurs in glacial and iceberg environments. It specifically refers to the breaking off of large chunks of ice from the edge of a glacier or ice shelf, resulting in the formation of icebergs. When glaciers extend into bodies of water, such as oceans or lakes, the warmer water erodes the front edge of the glacier, causing chunks of ice to detach and float away. These chunks, known as icebergs, can vary in size from small pieces to massive floating structures.
Calving is commonly associated with glaciers and ice shelves in polar regions, where large ice masses are constantly in motion. The process of calving plays a significant role in shaping the landscape and contributes to the movement of freshwater from glaciers to oceans. It is an important part of the natural cycle of ice formation and erosion, and it can have significant impacts on marine ecosystems and sea levels. However, it does not produce baby steers, roche moutonnee, moraines, or nunataks, as these terms are unrelated to the process of calving.
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Which of these pairs does not correctly match a carbohydrate with its function?
Answers
Of the available options, the first one states that cellulose is a structural part of the hair, this is not correct for several reasons, first cellulose is a biopolymer characteristic of cellular walls in plants, and it's not present in animal cells, secondly human hair is formed mainly of keratin a protein, therefore their basic units are amino acids, not carbohydrates. Therefore taking this into consideration, the correct answer is option 1.