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Female animals heterozygous for three recessive alleles (a/a+, b/+ , and c/c+ ) are mated with normal males. The phenotypes of the F1 progeny are as follows:
females:a+b+c+ 1991
males:a+b+c+ 31a+b+c 33a+bc+ 443a+bc 2ab+c+ 1ab+c 427abc+ 25abc 38
Explain the results. Show the genotypes of the parents, and construct a linkage map showing the correct order and distance of the loci.
For a given reaction, G = -4 kcal/mole and the energy of activation for the uncatalyzed reaction = 5 kcal/mole. You add an enzyme, after which the activation energy falls to 3 kcal/mole. What is the energy of activation for the reverse reaction in..
What is the significance of the first and last codons of an mRNA transcript?
Both the endocrine and nervous system are main regulating systems of the body though the nervous system has been compared to an airmail delivery system and the endocrine system to the pony express. Briefly explain the comparison.
The maltose transporter maltoporin Mr 49,913 spans the outer membrane of E. coli. It is comprised of eighteen successive antiparallel?
You are studying compound X and are trying to determine whether it is a competitive or a non-competitive inhibitor of an enzyme reaction catalyzed by the enzyme zyrase.
Think about a population of owls. For simplification purposes let's say that an owl's flight can be loud or silent and is a function of classic Mendelian genetics.
Briefly describe three specific aspects of transpiration and phloem transport that involve active transport of molecules.
Compare and contrast exergonic and endergonic reactions.
Long-Term Ecological Research (LTER) sites have been established around the United States for almost 30 years. Many types of ecosystems, organisms, and ecological research techniques are in use at these sites.
Assume that the rate of sea-floor spreading was constant during the 1-million-year period depicted above, what have to be the approximate age of marine fossils found in undisturbed sedimentary rock instantly overlying the igneous rock at the arrow la..
Did any of substances travel against their concentration gradient? Describe why or why not. Using your results from Chart 2, what was the fastest rate of facilitated diffusion recorded? _______________.
How is the gastrointestinal system of a woman affected by pregnancy?
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