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In a plant, leaf color and leaf shape are controlled by two linked genes Leaves of the wild-type plant are red. A recessive mutation in this gene causes white leaves. Wild-type leaves are pointed, and a recessive mutation in this gene causes them to be smooth. The following crosses were performed Cross 1: pure breeding white, smooth X pure breeding red, pointed gives: all red, pointed Cross 2: red, pointed F1 X pure breeding white, smooth (test cross gives: 40 white, smooth 36 red, pointed 10 white, pointed 14 red, smooth hape? What is the recombination frequency between the gene for color and for shape?
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Someone who is allergic to a particular compound (allergen) will often create a subtype of antibodies (immunoglobin E) to the allergen, and histamine levels will increase to produce the immune response. Although testing a particular food for the allergen is relatively straightforward, learning which potential allergen caused the response is much more challenging. Which might be the best technique to determine which allergen a person has been exposed to, and why?A. Western blot immunodetection of immunoglobin E can be determined by subjecting the allergen to SDS PAGE and transfer to Western blot.B. Mass spectroscopy determining the presense of antibodies in a person after exposure can be measured by the mass of immunoglobulin E.C. Mass spectroscopy measuring the increases in histamines can show whether the antigen has been exposed to the patient.D. ELISA using an allergen in a sandwich ELISA will capture the antibodies produced against the allergen.
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Observe a vertical section of human skin through a tattoo, using low-power magnification. Note the location of the dispersed ink granules within the upper portion of the dermis. From a thin vertical section of a tattoo, it is not possible to determine the figure or word of the entire tattoo as seen on the surface of the skin. Compare this to the location of melanin granules found in dark (heavily pigmented) skin. Suggest reasons why a tattoo is permanent and a suntan is not.
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The text below was part of an article in a teenage magazine:Young people today are far too materialistic.Do you agree?
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In order to establish the expiration date of perishable food, growth curve data must be collected. Once the microbial load is so high that it poses a hazard to human health, the food item is no longer considered safe (expired). Generally a microbial load of x50,000 bacteria/gram is considered unsafe. Your task is to determine the microbial growth curves for MicroYo, a new brand of yogurt. The growth is determined by sampling the yogurt and growing the bacterial isolates in broth culture which is then serially diluted by a total of x10,000 and inoculated onto standard petri plates of nutrient agar. The following colony counts are measured: Time (days) MicroYo colony count1 1 4 112 216 420 7a. 4.b. 16.c. 20.d. 12.
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the joint for nodding the head is what
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How do catalysts affect a chemical reaction?
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How many turn does a calvin cycle has?
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Which parent's X chromosome matches Calix's DNA?Mother'sFather'sBoth parentsNeither parents'
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When Mendel crossed the pollen from a plant with green pods with a plant with yellow seed pods, all of the offspring had green seed pods. This told him that green seed pods were dominant over yellow seed pods.
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What evolutionary relationship and classification is best supported by the data?
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define a reflex action
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What was Simard's first "aha" moment that there might be more to how trees coexist than we know?
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PLS HELP DO THIS AND I WILL MARK BRAINLISTResearch how coral reefs are formed. What types of animals live there? What important roles do cnidarians play in coral reefs? How do the tiny animals get their food? How do algae help the corals? Write a three-paragraph essay describing coral reefs.
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1.You have a cell with 26 chromosomes. It is undergoing meiosis. There will be _______ number of daughter cell that will be produced and each daughter cell will have __________ chromosome.Please help me fill in the blanks
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Chitin makes up the of a fungus cell1.cell membrane 2.cell wall3. Vacuole
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Which is a stretch of an exponential decay function?
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Which of the following is the complimentary DNA strand for the sequence shown below? ACT GCAA- ACG TCAB- ACU GCAC- UCT GCUD- TGA CGT
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Change that leads to maturity in living things is called
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What role do you think technology played in the shift from the geocentric to heliocentric model?
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During a study, a biologist counts the allele frequency of the colors of beetles. In the original population, there were 25% green, 35% blue, and 40% golden beetles. She took a small sample from the original population and bred them for 5 years. At the end of the study, 5 years later, there were 10% green, 60% blue, and 30% golden beetles. What did she observe?
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In prokaryotes, the processes of transcription and translation are said to be coupled, which means that: the primary transcript is immediately converted into mRNA. they are connected in space and time. the primary transcript is the mRNA. the primary transcripts carry the genetic information for the synthesis of several different proteins. several ribosomes bind to the same primary transcript.
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Wetlands help prevent _____________ by absorbing runoff from heavy rains.
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Can someone tell me if this looks ok? Here are the instructions-New title reflecting correct information-Detailed information about the processes (Earthquake, Volcano, Island formation, Ocean Expansion) and tectonic plate interactions that are causing the geological event to occur. Explain how the one you choose actually happens.-Real-world example of where to find the geological event on Earth (picture and location)
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