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Recessive mutant alleles of an x-linked gene in Drosophila, crossveinless (cv), prevent the development of supporting structures in the wings. Recessive mutant alleles of another x-linked gene, vermilion (v) cause a bright red eye phenotype (the wildtype eye colour is brick red). The location of an x-linked recessive lethal gene (l) was tested in relation to the cv and v loci. A female heterzygote for the lethal was mated to a male carrying cv and v. F1 heterozygous females ( l/cv v) were testcrossed to males from the cv v strain and the following percentages of phenotypes were observed in the progeny:
Phenotype: FEMALES Males
Wildtype 38.8 0.3
Crossveinless, Vermilion 38.8 77.3
Crossveinless 11.2 7.7
Vermilion 11.2 14.7
a) what is the linkage order of the three genes?
b) what is the coefficient of coincidence?
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Suppose that you perform the following monohybrid cross in dogs: Aa X Aa, in which the dominant A allele produces black coat color and the recessive a allele produces a white coat color.
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Explain why only certain cell types are permissive for transcription of HIV proviral DNA. What cellular factors are involved and why?
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Perineal pain due to swelling is common after delivery. Discuss how can it be treated? If extreme pain is Developing and getting worse over time and is unrelieved by pain medications.
Rabbits heterozygous for Pelger trait and exhibiting that phenotype are crossed. The offspring appear in a 2:1 ratio (Pelger : normal). Explain this strange ratio.
Discuss how does the altered primary structure of hemoglobin from sickle cell patients affect its tertiary structure?
What trends would they have noticed in Earth's terrestrial vegetation over this period.
Determine the relationship of cardiac output and Emax of the left ventricle in regards to heart failure?
Think about a diploid organism with the genotype BbGgNnZZ. List all the different gamete types that this individual can produce.
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