What will be the frequency of the r and r alleles

Assignment Help Biology

Reference no: EM133361513

Spongy moths, Lymantria dispar, have four life cycle stages: egg, caterpillar, pupa and adult (Figure 1). Their populations may be severely impacted by nuclear polyhedrosis viruses (NPVs; figure 2). These viruses infect, and kill, caterpillars; eggs and adults are unaffected by them.

In a population of spongy moths, there is a gene with two alleles, R and r. Individuals with one or two copies of the dominant allele, R, are resistant to NPV (it infects them but causes no symptoms and is harmless). Individuals with two copies of the recessive r allele are susceptible to NPV (it is 100% lethal to them).

Initially a population consists of 1000 eggs and no other stages. There are 360 individuals (embryos inside the eggs) with the genotype RR, 480 individuals with the genotype Rr, and 160 individuals with the genotype rr.

This question has two parts.

Part a) If all caterpillars become infected with NPV and mortality due to NPV is the only factor causing evolution in this population

a) what will be the frequency of the R and r alleles in the population when the moths reach adulthood? Show all calculations. Express answers as proportions and round to two significant digits.

b) When the survivors from part a) mate and have offspring, what will be the frequency of RR, Rr and rr genotypes in the resulting (second generation of) eggs? Remember NPV is the only thing causing evolution in this population. Show all calculations. Express answers as a proportion and round to two significant digits.

Reference no: EM133361513

Questions Cloud

Discuss human population trends for your locale : Discuss human population trends for your locale. Is the population decreasing, increasing, or stable? Compare this trend with the larger region such

What would be the most beneficial, and the least effective : You are a program manager at a local public health department tasked with increasing physical activity of adults in your community. What would be the most

Write a system of linear inequalities : write a system of linear inequalities that reflects the conditions indicated. Find the set of feasible solutions graphically for the amounts of each kind

Describe the john hopkins ebp model : Describe the John Hopkins EBP model, who developed it and why, the steps or process of the model, the strengths, the weaknesses of the model and how the model

What will be the frequency of the r and r alleles : what will be the frequency of the R and r alleles in the population when the moths reach adulthood? Show all calculations. Express answers as proportions

What outdoor accommodations did you see : What outdoor accommodations did you see? List the accommodations and adaptations you saw in the DVD for routines? What models of collaboration did you see

Explain the nubian origins of kemet : Explain the Nubian origins of Kemet and Identify and describe a minimum of five (5) accomplishments of Kemet

Trace the path of plant evolution from the most primitive : trace the path of plant evolution from the most primitive to the most advanced. Explain how each type of organism differs from the preceding and explain why the

What is the clozapine rems program : What is the Clozapine REMS program? What patient information do you have to enter each week, or two weeks, or monthly? Can you prescribe Clozapine

User Account

All Pages