Answered: A population has 25 individuals of…

A population has 25 individuals of genotype AA, 25 individuals of genotype aa, and 50 individuals of genotype Aa. Is this population in Hardy Weinberg equilibrium? 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 7QP: How Can We Measure Allele Frequencies in Populations? Drawing on your newly acquired understanding...

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Concept explainers

Gene Flow

Gene flow, also known as gene migration, is the introduction of genetic material from a particular population to another population of the same species through interbreeding. For example, a bee facilitates its reproductive process by carrying pollen from one flower to another. The flow alters the composition of the gene pool of the receiving population. It introduces new alleles within the population and helps increase variability. This exchange of genetic material occurs through reproduction and brings about new combinations of traits into the population. Where human beings are concerned, actual migration of populations, whether voluntary or forced, brings about gene flow.

Population Biology

Population biology is the study of patterns in organism populations, specifically the growth and management of population size, population genetics, the evolution of life history, species interactions, and demography.

Speciation

The process of speciation involves the formation of new species during evolution. The new species evolve in such a way that both new and old species are not able to interbreed. Thus, speciation occurs when few members of one species get separated from the main species due to geographical, mechanical, or reproductive isolation. These separated members develop new traits that make them different from the main species. In other words, speciation could be defined as the absence of gene flow between two populations that become new species.

Allele Fixation

A gene is a unit of heredity and contains both physical and functional information that shapes an individual. Genes are made up of DNA (deoxyribonucleic acid), which carry genetic information from one generation to another, from one set of parents to their offspring, and so on. Every cell in a human body, or any living organism, has the same DNA, which implies that every cell in an individual’s body has all the information it needs to build and sustain the body!

Question

A population has 25 individuals of genotype AA, 25 individuals of genotype aa, and 50 individuals of genotype Aa. Is this population in Hardy Weinberg equilibrium? Why or why not?

Group of answer choices

A. No because p2 + 2pq + q2 does not equal 1

B. Yes because p2 + 2pq + q2 = 1

C. Yes because the genotype frequencies match HW expectations based on allele frequencies

D. No because there are more heterozygotes than expected under Hardy Weinberg

E. No because there are fewer heterozygotes than expected under Hardy Weinberg

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