In human population A, hitchhiker's thumb is a simple Mendelian trait. For this trait, N is the dominant allele and n is the recessive allele. Individuals who are homozygous dominant (NN) or heterozygous (Nn) express nonhitchhiker's thumbs. Individuals who are homozygous recessive (nn) express hitchhiker's thumbs. In this population, 90% (0.9) of the alleles are dominant (N) and 10% (0.1) are recessive (n). • Use the Hardy-Weinberg equation to determine the genotype frequencies we should expect in the next generation. Show your work for your answer. • You have collected data on the observed genotype frequencies of the next generation. They are 70% NN, 20% Nn, and 10% nn. Based on these observations and your expectations, is this trait currently evolving in this population? Why or why not

Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter19: Population Genetics And Human Evolution
Section: Chapter Questions
Problem 9QP: Using the HardyWeinberg Law in Human Genetics Suppose you are monitoring the allelic and genotypic...
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In human population A, hitchhiker's thumb is a simple Mendelian trait. For this trait, N is the dominant allele and n is the recessive allele. Individuals who are homozygous dominant (NN) or heterozygous (Nn) express nonhitchhiker's thumbs. Individuals who are homozygous recessive (nn) express hitchhiker's thumbs. In this population, 90% (0.9) of the alleles are dominant (N) and 10% (0.1) are recessive (n).

• Use the Hardy-Weinberg equation to determine the genotype frequencies we should expect in the next generation. Show your work for your answer.
• You have collected data on the observed genotype frequencies of the next generation. They are 70% NN, 20% Nn, and 10% nn. Based on these observations and your expectations, is this trait currently evolving in this population? Why or why not?

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