Biology Illinois Edition (Glencoe Science)
Biology Illinois Edition (Glencoe Science)
7th Edition
ISBN: 9780078759864
Author: Alton Biggs
Publisher: MCG
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Question
Chapter 13, Problem 1A
Summary Introduction

To fill:

The correct term in given blank.

Introduction:

If an individual has the dominant phenotype, its genotype may be homozygous or heterozygous. The zygosity is not always known. In such case, a test is done to know the genotype of the individual.

Expert Solution & Answer
Check Mark

Answer to Problem 1A

A test cross is used to determine the genotype of a plant or animal.

Explanation of Solution

test cross is done to determine the organism's genotype. In a testcross, the individual with the unknown genotype is crossed with a homozygous recessive individual. 1f the parent’s genotype is homozygous dominant, all of the offspring will have the dominant phenotype, if it is heterozygous, the offspring will show a 1:1 phenotypic ratio.

Conclusion

The test cross is used to determine the genotype of a plant or animal.

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