Biology: The Unity and Diversity of Life (MindTap Course List)
Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
Chapter 13, Problem 1SQ

A heterozygous individual has a _______ for a trait being studied.

  • a. pair of identical alleles
  • b. pair of nonidentical alleles
  • c. haploid condition, in genetic terms
Expert Solution & Answer
Check Mark
Summary Introduction

Concept introduction: The pair of chromosomes where one of the pairs is of the maternal source and the other is of the paternal source that has genes in the same loci with variable alleles of the gene is called homologous chromosomes. The allele is the modification of the gene. The alleles are of two types, namely dominant and recessive.

Answer to Problem 1SQ

Correct answer:  A heterozygous individual has a pair of nonidentical alleles for a trait being studied. Therefore, option b. is correct.

Explanation of Solution

Reasons for the correct statement:

Homozygous individuals have the same alleles on the gene loci either dominant homozygous or recessive homozygous. Heterozygous individuals have one dominant allele and one recessive allele. Thus, two different types of alleles of the same gene are present in the gene loci that are not identical to each other.

Option b. is given as “a pair of nonidentical alleles”

As heterozygous individuals possess different alleles of the same gene for the trait expressed, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “a pair of identical alleles”.

Homozygous individuals only have the same allele on both homologous chromosomes that is, the pair of identical alleles. Therefore, option a. is incorrect.

Option c. is given as “haploid condition, in genetic terms”.

Haploid condition refers to half the number of chromosomes. A heterozygous individual has two sets of chromosomes. Therefore, option c. is incorrect.

Hence, options a. and c. are incorrect.

Conclusion
A heterozygous individual has two different alleles that are dominant and recessive and are studied for phenotypic traits.

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
The flower color gene studied by Mendel affected three traits. This is an example of ________.   a. pleiotropic genes   b. codominant inheritance   c. polygenic inheritance
Many genetic disorders are inherited in a recessive manner Select one: a. False b. True
In man, the allele for normal color (A) is dominant to the allele for albinism (a). A normal man whose father was albino married a normal woman whose mother was albino. a. What are the chances that their first child will be albino? b. What are the chances their second child will be albino?
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
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
How to solve genetics probability problems; Author: Shomu's Biology;https://www.youtube.com/watch?v=R0yjfb1ooUs;License: Standard YouTube License, CC-BY
Beyond Mendelian Genetics: Complex Patterns of Inheritance; Author: Professor Dave Explains;https://www.youtube.com/watch?v=-EmvmBuK-B8;License: Standard YouTube License, CC-BY