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Genetic frequency

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1. In ladybugs, wings with 4 spots are recessive to those with 2. Assume 11% of the ladybugs have 4 spot wings. If the mutation rate of 2 spot to 4 spot alleles is 0.047, what percentage of the next generation will be heterozygous?

2. You look at two populations of moose, one from Canada, and one from Newfoundland, an island east of the North American continent. Canadian moose have a dominant allele for antler size with a frequency of 0.34. Newfie moose have a frequency of 0.72 for the same allele. Assuming that 1 percent of the moose migrates from Canada to Newfoundland (an amazing dispersal rate for a terrestrial macrovertebrate across an oceanic body of water), what would be the allele frequency after 2 generations?

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1. Let's start with the information we have been given. 4 spots is recessive to 2 spots.
T= 2 spots
t= 4 spots

11% of the population is 4 spots (tt). That means that the allelic frequency is the square root of 11% = 33%.

According to Hardy-Weinberg allele frequency is given as

p+q= 1

1= (p)squared + 2pq + (q)squared

p= 33%
q= 67%

If the mutation rate of q->p= 0.047 that means that the ...

Solution Summary

Calculations and explanations of the two population genetics questions presented.

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Genetic variation and disease

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Using these frequencies, calculate the frequencies of all possible genotypes in a population in Hardy-Weinberg equilibrium.

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What is the frequency of females' homozygous for d allele (XdXd)?

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