Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 20: Problem 15

Which of the following indicates a heterozygous individual? a. \(A B\) b. \(A A\) c. \(A a\) d. \(a a\)

Short Answer

Expert verified
Option c. \(A a\) indicates a heterozygous individual, as it has one dominant allele (A) and one recessive allele (a) for the same gene.

Step by step solution

01

Understanding the term "heterozygous"

For an individual to be considered heterozygous for a certain gene, they must have two different alleles for that gene. In other words, the two gene copies (inherited from each parent) should be of different forms, one being dominant (capital letter, e.g. A) and the other recessive (lowercase letter, e.g. a).
02

Evaluating each option

We need to check each option to see if they represent a heterozygous individual: a. \(A B\) - This option has two different letters, not different forms of the same letter, so it doesn't represent a heterozygous individual. b. \(A A\) - In this option, both gene copies are the same (both are dominant), so this individual is homozygous dominant, not heterozygous. c. \(A a\) - This option has two different forms of the same letter (one dominant and one recessive), so it represents a heterozygous individual. d. \(a a\) - In this option, both gene copies are the same (both are recessive), so this individual is homozygous recessive, not heterozygous.
03

Choose the correct option

Based on our evaluation of each option, we can conclude that option c. \(A a\) represents a heterozygous individual, as it has one dominant allele (A) and one recessive allele (a) for the same gene.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Alice and Henry are at the opposite extremes for a multifactorial trait. Their children will a. be bell-shaped. b. be a phenotype typical of a 3: 1 ratio. c. have the middle phenotype between their two parents. d. look like one parent or the other.

A straight hairline is recessive. If two parents with a widow's peak have a child with a straight hairline, then what is the chance that their next child will have a straight hairline? a. no chance b. \(1 / 4\) c. \(3 / 16\) d. \(1 / 2\) e. \(1 / 16\)

The genotype of an individual with the dominant phenotype can be determined best by reproduction with a. the recessive genotype or phenotype. b. a heterozygote. c. the dominant phenotype. d. the homozygous dominant. e. Both a and b are correct.

What are the phenotypes and genotypes for the ABO blood groups? If both parents are type AB blood, what are the possible genotypes and phenotypes for their children, including the expected percentages? (pages \(480-81\) )

Define and give an example of each of the following inheritance patterns: polygenic inheritance, multifactorial trait, incomplete dominance, codominance, and multiple alleles. (pages \(479-81)\)
See all solutions

Recommended explanations on Biology Textbooks

Microbiology

Read Explanation

Biological Structures

Read Explanation

Cells

Read Explanation

Cellular Energetics

Read Explanation

Heredity

Read Explanation

Cell Cycle

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free