A population of tree frogs living in the Amazon rainforest have two skin color phenotypes controlled by the same gene.  Homozygous dominant and heterozygous individuals have green skin while homozygous recessive individuals have blue skin.  In the first generation, analysis of the alleles for this gene shows that 70 alleles of this gene are green, and 130 alleles of this gene are blue in the population.  In the second generation, 90 alleles are green and 110 alleles are blue. Finally, in the third generation, 120 alleles are green and only 80 are blue. Based on this data, which description best describes this population of tree frogs? There are no individuals migrating into or out of the population. The frogs are randomly mating with each other. The population size of frogs is very large. The green skin color is being selected over blue skin color.

Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter8: Patterns Of Inheritance
Section: Chapter Questions
Problem 13RQ: When a population has a gene with four alleles circulating, how many possible genotypes are there?...
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A population of tree frogs living in the Amazon rainforest have two skin color phenotypes controlled by the same gene.  Homozygous dominant and heterozygous individuals have green skin while homozygous recessive individuals have blue skin.  In the first generation, analysis of the alleles for this gene shows that 70 alleles of this gene are green, and 130 alleles of this gene are blue in the population.  In the second generation, 90 alleles are green and 110 alleles are blue. Finally, in the third generation, 120 alleles are green and only 80 are blue. Based on this data, which description best describes this population of tree frogs?

  • There are no individuals migrating into or out of the population.
  • The frogs are randomly mating with each other.
  • The population size of frogs is very large.
  • The green skin color is being selected over blue skin color.
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