EBK BIOLOGY
EBK BIOLOGY
10th Edition
ISBN: 8220100474729
Author: Martin
Publisher: Cengage Learning US
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Chapter 19, Problem 1TYU

The genetic description of an individual is its genotype, whereas the genetic description of a population is its (a) phenotype (b) gene pool (c) genetic drift (d) founder effect (e) changes in allele frequencies

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Summary Introduction

Introduction: A gene can be referred to as a part of genetic material. They pass information from one generation to another. The genes contain DNA which decides the genotype of an individual. The genotype along with the geographical conditions determines the phenotype of an individual. The phenotype can be described as the physical appearance of an individual.

Answer to Problem 1TYU

Correct answer: Gene pool represents the genetic information of a population. Hence, the correct answer is option (b).

Explanation of Solution

Reason for the correct answer:

Gene pool of a population gives information about all the alleles for all the loci present in that population. It provides information about the genotypic description of the population by which phenotypic description of that population can be determined. The genetic variation among different populations can also be identified with the help of a gene pool. Therefore, gene pool gives the genetic description of a population.

Option (b) is given as “gene pool”.

Gene pool gives the information about all the alleles of all the loci in a population which represents the genetic description of a population. Hence, option (b) is correct.

Reasons for incorrect answers:

Option (a) is given as “phenotype”.

The phenotype of a population gives the information about the physical appearance of the individuals living in that population which does not represent the genetic description a population. Hence, option (a) is incorrect.

Option (c) is given as “genetic drift”.

Genetic drift can be described as a random change in the frequency of allele of a small population which does not represent the genetic description of the population. Hence, option (c) is incorrect.

Option (d) is given as “founder effect”.

The founder effect is also a genetic drift which occurs when a new area is colonized by a small population. Hence, option (d) is incorrect.

Option (e) is given as “changes in allele frequency”.

The change in allele frequency describes only about the genetic variation within the population, but do not give all the genetic description of a population. Hence, option (e) is incorrect.

Hence, options (a), (c), (d), and (e) are incorrect.

Conclusion

Gene pool represents the genetic description of a population.

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Students have asked these similar questions
If a population’s allele and genotype frequencies remain constant from generation to generation, (a) the population is undergoing evolutionary change (b) the population is said to be at genetic equilibrium (c)microevolution has taken place (d) directional selection is occurring, but only for a few generations (e) genetic drift is a significant evolutionary force
Evolution is most accurately described as a change in allele frequencies in over time. (a) an individual (b) a species (c) a population (d) a community
Which of the following is not true of natural selection?(a) natural selection acts to preserve favorable traits and eliminate unfavorable traits (b) the offspring of individuals that are better adapted to the environment will make up a larger proportion of the next generation (c) natural selection directs the course of evolution by preserving the traitsacquired during an individual’s lifetime (d) natural selection Test Your Understanding acts on a population’s genetic variability, which arisesthrough mutation (e) natural selection may result in changes in allele frequencies in a population

Chapter 19 Solutions

EBK BIOLOGY

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