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Q1. An enterprising pet store owner is attempting to create a pure strain of ultra-dwarf mice to sell as novelty pets. He breeds 10 pairs of ultra-dwarf mice and counts the different phenotypes seen in the offspring. (A wild-type mouse litter is 10 mice.) In the F1 generation, 50 are ultra-dwarf, and 25 are wild-type. Each time he breeds two ultra-dwarves he gets the same ratio.
1. What is going on?
2. Will he ever get a pure strain? If not, why with reason?
Q2. As Ben jumped on his bike and headed for the fresh water lake, his mom called after him, "Don't swim if we have an electrical storm-it looks threatening". That was a valid request. Why with reason?
About 5 percent of individuals with Down syndrome have a chromosomal translocation in which a third copy of chromosome 21 is attached to chromosome 14. If this translocation occurred in a parent's gonad, how can it lead to Down syndrome in a child.
A plant is growing in the middle of a patch of bare dirt; there are no other plants within twenty meters except for one other plant one meter away.
What are the various volumes in the mammalian lungs measured by spirometry?
Diagram an angiosperm seed. Identify the tissue or cell that each part is derived from. Distinguish between diotyledonous and monocotyledonous seeds; albuminous and exalbuminous seeds. Explain what happens in ripening and after-ripening.
Restriction enzyme HinfI cleaves a five nucleotide DNA sequence GA(A/T)TC. The ambiguity in the central position - (A/T) - means that either A or T can occur in the cleavage site.
What are the steps involved in forming the Ig mRNA(s) that will encode a complete immunoglobulin molecule? Include all steps at both the DNA and RNA level and the molecules involved in the process as well as their function.
Explain physiological changes that occur in three different organ systems when food is ingested and how these systems coordinated a response in the human body.
After 1.00 ml of water is completely vaporized to gas, how many milliliters of vapor are produced at standard temperature and pressure? (Density of water is 1.00 g/mL; molar volume of any gas at STP is 22.4 L/mol.)
On what part of the body is the Pseudostratified ciliated columnar epithelial tissue located and what is its function?
The conversion of molecule S to productP has a Keq = 0.75. Two different, but relatedenzymes, A and B, can catalyzethe reaction. The product P serves as anallosteric inhibitor of enzyme B, but not ofenzyme A.
he human genome project initially predicted 100,000 genes due to the number of proteins found through western blots. When near completion, computer analysis of the sequence predicted only 30,000 genes.
TSIA and KIA are complex media with many ingredients. What would be the consequences of the following mistakes in preparing this medium? Consider each independently.
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