Biology with Connect Access Card
Biology with Connect Access Card
10th Edition
ISBN: 9780077705701
Author: Raven, Peter
Publisher: McGraw-Hill Education
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
Chapter 20, Problem 1U

Assortative mating

a. affects genotype frequencies expected under Hardy–Weinberg equilibrium.

b. affects allele frequencies expected under Hardy–Weinberg equilibrium.

c. has no effect on the genotypic frequencies expected under Hardy–Weinberg equilibrium because it does not affect the relative proportion of alleles in a population.

d. increases the frequency of heterozygous individuals above Hardy–Weinberg expectations.

Expert Solution & Answer
Check Mark
Summary Introduction

Introduction:

Assortive mating involves matting of phenotypically similar individuals. It is a type of non-random mating those results in the frequencies of particular genotypes and the allelic frequency of that population is different from the Hardy–Weinberg principle.

Answer to Problem 1U

Correct answer:

Assortive mating occurs when individuals choose their mates based on their resemblance each other on the basis of certain phenotype that upset the Hardy–Weinberg principle. Therefore option a. is correct.

Explanation of Solution

Reason for the correct statement:

Assortive matting involves mates of similar phenotype. Its effect is limited to genes that influence the phenotype and its impact on the overall population is limited by mating that is otherwise random.

Option a. is given as “affects genotype frequencies expected under Hardy–Weinberg equilibrium”.

As, the random mating is a requirement of genetic equilibrium whereas assortive mating affects the genotypic frequency within individuals as it select the mate based on similar traits and does not support the Hardy–Weinberg principle for genetic equilibrium.

Hence, the option a is correct.

Reasons for incorrect statements:

Option b. is given as “affects allele frequencies expected under Hardy–Weinberg equilibrium”.

Assortive mating affects the genotypic frequency not the allelic frequency as expected under Hardy-Weinberg equilibrium. So it is a wrong answer.

Option c. is given as “has no effect on the genotypic frequencies expected under Hardy–Weinberg equilibrium because it does not affect the relative proportion of alleles in a population”.

Assortive mating occurs between the individual of similar traits it affects the genotypic frequency and not the allelic frequency in a population as expected under Hardy-Weinberg equilibrium. So it is a wrong answer.

Option d. is given as “increases the frequency of heterozygous individuals above Hardy–Weinberg expectations”.

Assortative mating results when individuals mate with partners that are like themselves in certain phenotypic characters, it results in fewer heterozygotes than Hardy-Weinberg predicts. So it is a wrong answer.

Hence options b, c, and d are incorrect.

Conclusion

Assortative mating affects genotype frequencies expected under Hardy–Weinberg equilibrium.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Which of the following is the process that is "capable of destroying all forms of microbial life"? Question 37 options: Surgical scrub Sterilization Chemical removal Mechanical removal
After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.) After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.)   Data Table 1Stage    Totals    PercentInterphase        Mitosis:        Prophase        Metaphase        Anaphase        Telophase        Cytokinesis        Totals    100    100% To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…
What are Clathrin coated vesicles and what is their function?
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Text book image
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Text book image
Concepts of Biology
Biology
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:OpenStax College
Text book image
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Biology
ISBN:9781305967359
Author:STARR
Publisher:CENGAGE L
Text book image
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Text book image
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
Mendelian Genetics and Punnett Squares; Author: Professor Dave Explains;https://www.youtube.com/watch?v=3f_eisNPpnc;License: Standard YouTube License, CC-BY
The Evolution of Populations: Natural Selection, Genetic Drift, and Gene Flow; Author: Professor Dave Explains;https://www.youtube.com/watch?v=SRWXEMlI0_U;License: Standard YouTube License, CC-BY