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A man makes 0 units of an enzyme due to homozygous recessive genes on chromosome 21. His wife makes 100 units of the enzyme due to a heterozygous pair of genes on chromosome 21. They have a son with trisomy 21 who makes 200 units of the enzyme.
a. In which parent did the nondisjunction occur?
b. Did the nondisjunction occur in meiosis I or meiosis II (explain your answer)?
A male Drosphila melangaster is genotypically e^+/e^-, where e (ebony) is an autosomal gene. Of the four gametes produced by a single meiosis.
In a series of two-point map crosses involving five genes located on chromosome second in Drosophila, the following recombinant frequencies were observed:
Select a specific gene and a specific alteration. Explain the effects of the modifications and why it might contribute to the cancer.
Soil stabilization is the permanent physical and chemical alteration of soils to enhance their physical properties. Stabilization can increase the shear strength of a soil and control the shrink-swell properties.
Mitchell's original chemiosmotic hypothesis relies on the impermeability of the inner mitochandrial membrane to ions other than H+, sch as Na+ and Cl-
The two largest marine predators are killer whales and big sharks such as great whites. Suppose that a killer whale and a great white shark of the same size and weight are capable of swimming at the same maximum velocity
Discuss some of the recent (within five years) and current research on Nutrition, Obesity, and Atherosclerotic Cardiovascular Disease.
Why is that intermediate filaments have identical ends and lack polarity, whereas actin filaments and microtubules have two distinct ends with a defined polarity?
Find out the genotypes of the two black females and the brown male using allele symbols B and b. One shows linear carbon chains, another has one -CH3 groups present on the third carbon atom, and third has two -CH3 groups present on the second carbon ..
Explain two ways that mutations can affect the phenotypes that does not include alteration of the protein coding sequence.
What is the effect of added succinate to rotenone-blocked, amytal-blocked, or cyanide-blocked mitochandria? In other words, can succinate help "bypass" the block? Explain.
A project is underway to develop a vaccine against mouse hepatitis virus, a pathogen of mice. The vaccine consists of capsid protein of the virus, which is injected subcutaneously as a depot in alum on day 0. At days 5 and 14, the group of six mic..
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