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Genes A/a and B/b are linked and known to be 20 map units apart. Individuals heterozygous for both of these genes (genotypes= AB/ab) were mated with each other. If there 2000 offspring from this cross, how many of the offspring would you expect to show Ab or aB phenotypes?
125 progeny were produced from the following cross: aaBbCcDd x AaBbccDD. Assume that all the genes are unlinked, and that the uppercase letters represent dominant alleles.
Trace the pathway of blood through your body including the four chambers of the heart, four cardiac valves, aorta, vena cava, pulmonary arteries and veins, lugs, artery, arterioles, veins, venules, and capillaries.
A subject extends his arm palm up to catch a falling object. The contact of object with the hand triggers a reflexive response in the biceps muscle. But this response is different and opposite if the object is a raw egg instead of a ball. Explain why..
Ion concentrations have a impact on whether there is dissolution of minerals. Microorganisms can alter the charges on their cell surfaces to enhance these processes.
What types of filtration membranes/structures exist in our body (or a mammalian body) that allow only blood cells to pass through but not other substances such as cholesterol or something of a bigger molecular size than blood cell like a small clo..
Discuss in detail how fungi get their nutrition. Relate this mode of nutrition to how a bed of fungal hyphae can so rapidly breakdown organic materials such as fallen leaves that are in contact with the soil.
Many flowering plants have co-evolved with their pollinators, while others have not. Give one advantage and one disadvantage for flowering plants that have generalists pollinators and flowering plants that have specialist pollinators.
Curare, a poison extracted from a South American shrub, blocks the binding of Ach by muscle cells. What do you suppose would happen to your muscles, including the ones involved in breathing, if a toxic dose of curare entered your bloodstream?
describe the basic structures of protozoa. can these same structures be seen in bacteria usng a light microscope.
Elite controllers are pople with HIV infection whose immune systems naturally keep levels of the virus extremely low. Researchers are conducting genome-wide SNP analyses of these people.
You are a biologist working in Montana when you find a fossil wedged between two ancient layers of sedimentary layers. What technique would be the best tool to use to find the age of the fossil?
Determine which of the following observations are testable. For those that are testable.
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