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
Biopharmaceutics and Pharmacokinetics:Two-Compartment Model Instant Absorption Questions SHOW ALL WORK, including equation used, variables used and each step to your solution, report your regression lines and axes names (with units if appropriate) :Calculate a-q  a) B1,   b) B2,   c) hybrid rate constant (1) d) hybrid rate constant (2) e) t1/2,dist f) t1/2,elim   g) k10 h) k12 i) k21 j) initial concentration (C0)   k) central compartment volume (V1) l) steady-state volume (Vss)   m) clearance (CL)  AUC (0→10 min) using trapezoidal rule n)  AUC (20→30 min) using trapezoidal rule o) AUCtail (AUC360→∞)   p) total AUC (using short cut method) q) volume from AUC (VAUC)
Glitazones reduce insulin resistance by binding to a transcription factor in adipocytes, thereby reducing thesecretion of fatty acids. Glitazones are taken orally (in pill form). Using pharmacokinetic modeling, deriveequations to describe how the concentration of glitazones varies in the plasma as a function of time. Yourequations should be of the form: dCglitazone /dt = something, or dMglitazone /dt = something. Your model shouldinclude three compartments: the gut, the plasma, and the fatty tissues. Make sure to include a diagram thatillustrates your thinking, state all assumptions, and define your variables. Do not solve the equations.
Case Study—Ella Review the case study and then answer Parts A through F. Ella has a family history of diabetes. She wants to follow a healthful eating pattern that can lower her risk for developing this condition. Her dietitian recommends a goal of 450 to 600 kcal per meal and advises Ella to follow the Acceptable Macronutrient Distribution Range (AMDR) for carbohydrates and the Dietary Guidelines for Americans 2015-2020, which recommend limiting added sugar. She also recommends that Ella choose whole grains rather than processed grains. Ella decides to pack a lunch to take to work every day. This morning she’s making a sandwich for her lunch.   Categories of Sandwich Options (Top of the screen) Breads Spreads Cheeses Vegetables Proteins Specific food items to select White Bread 6-inches Honey Mustard Provolone LettuceTomatoBell Peppers Turkey Part A - Reading Nutrition Facts Panels for Total Kilocalories   How many total kilocalories are in Ella’s sandwich?   _____…
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