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A population of Hawaiian Drosophilia is segregating two alleles, p1 and p2, of the phosphoglucose isomerase (PGI) gene. In a sample of 500 flies from this population, 26% were p1p1 homozygotes, 62% were p1p2 heterozygotes, and 12% were p2p2 homozygotes. Answer the following questions based on this data:
a- What are the frequencies of the p1 and p2 alleles?
b- Are the genotypes in this sample in Hardy-Weinberg Equilibrium?
In some genetically engineered corn plants the dominant gene (D) produces a protein that is lethal to certain insect pests that eat the corn plants. It was found that the pollen could also kill the insect pests. If a corn plant is heterozygous for..
Explain how adult stem cells can sense and respond to the nutritional status of an animal. Explain what kind of cues an adult stem cell can respond to, and where these cues are coming from.
Some of the Drosophila you are working with have miniature wings. Suppose you perform the following three crosses to determine the heritance of the miniature wing phenotype.
In peas, the genes a, b, c, d, e and f are linked on chromosome V and in the order given and the map distances are RF(a-b)=7 cM, RF(b-c) = 17 cM, RF(c-d) = 12 cM, RF (d-e) = 14 cM RF(e-f)= 10 cM.
When a yellow female Labrador retriever was mated with a brown male, half of puppies were brown and half were yellow. The same female, when mated to a brown male produced all brown puppies.
Determine which mode of inheritance produces heterozygotes with phenotypes that differ from homozygote but more closely resembles one homozygous phenotype than other?
Discuss embryonic stem cell invitro methord in which transgenic animal were generated and efficient show how homologous recombination happening?
What types of ethical issues arise when an organization conducts research? Can you provide two examples of an ethical issues in a real world research situation?
Draw a diagram that represents the molecular structure of a phospholipid. Be sure to show any part of the molecule that might be charged. Describe 2 ways in which the molecular structures of phospholipids and triglycerides are similar, and two ways ..
Compound with amino groupConsider two small, identical, organic molecules in the cytoplasm of a cell, one with a hydroxyl group (-OH) and the other with an amino group (-NH2).
Know how liquid (broth) and solid forms of media (slants, deeps, petri dishes) are prepared and sterilized in an autoclave.
Reverse transcriptase might be present in cells that have not been infected by a retrovirus since of the presence of what.
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