Biology question

Question 1

Consider a series of island populations each founded by a single individual that is heterozygous at a particular locus. If the alleles at this locus are neutral, and there is no mutation or migration, describe what the variation will look like after many generations within each population. Why?

Question 2

Why is under dominance so rare in natural population?

Question 3

Imagine a colorful population of insects. Out of 350 individuals in the population, 25% are red, 40% are purple, and the remaining are blue. Red collaration is caused by homorygorsity of the R allele at a single locus; blue coloration is caused by homozygously of the B allele at that locus; heterozygotes are purple. Is this population in Hardy-Weinberg equilibrium at this locus? Show all work.

Question 4

What would result 1/4 of the F2 population to be short. This is known through doing a punnet square with the F1 generation like shown below (Tt x Tt)

Question 5

Describe how to determine whether a population is in Hardy-Weinberg equilibrium at a locus with two incompletely dominant alleles. For example, imagine that flower color is controlled by two alleles, R and W. Individuals with the RR genotype have red flowers; those with WW have white flowers; and heterozygotes (RW) have pink flowers. 

Question 6

Pea aphids are found in two colors, pink and green. Imagine that those colors are determined by two alleles at a single locus, when green is dominant to pink. Consider a population when these are 520 pink aphids out of a total of 800 aphids. If the population is in Hardy-Weinberg equilibrium, how many of the green aphids do you expect to be homozygote?



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