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Chapter 27: Problem 1

What is the gene pool? How is a gene pool described in a quantitative way?

Short Answer

Expert verified
A gene pool is the total of all different genes present in a population. It can be described in a quantitative way by calculating allele frequencies, which tell us the relative proportion of different alleles within the population.

Step by step solution

01

Define Gene Pool

A gene pool can be defined as the total of all the different genes present in a population. It encompasses the full genetic diversity available within a particular group of organisms.
02

Quantitative Description of a Gene Pool

A gene pool can be described quantitatively by calculating allele frequencies. An allele frequency is defined as the relative proportion of an allele within a population. It can be calculated by dividing the number of a certain allele by the total number of alleles in the population. The result is a numerical representation, which often is presented as a percentage or a fraction.
03

Example Calculation of Allele Frequency

For example, if in a population of 100 animals, 70 individuals are carrying Allele A and 30 individuals carry Allele B for a particular gene. So the frequency of Allele A is\( \frac{70}{100} = 0.7 \) or 70%, and the frequency of Allele B is \( \frac{30}{100} = 0.3 \) or 30%.

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Most popular questions from this chapter

The term polymorphism can refer to both genes and traits. Explain what is meant by a polymorphic gene and a polymorphic trait. If a gene is polymorphic, does the trait that the gene affects also have to be polymorphic? Explain why or why not.

What is the difference between a neutral and an adaptive evolutionary process? Describe two or more examples of each. At the molecular level, explain how mutations can be neutral or adaptive.

Why is genetic drift more significant in small populations? Why does it take longer for genetic drift to cause allele fixation in large populations than in small ones?

What is Darwinian fitness? What types of characteristics can promote high fitness values? Give several examples.

Does inbreeding affect allele frequencies? Why or why not? How does it affect genotype frequencies? With regard to rare recessive diseases, what are the consequences of inbreeding in human populations?
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