Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 12, Problem 6TYK
Summary Introduction

To analyze:

The phenotypes and their phenotypic ratios of F1 individuals (true-breeding varieties)

if allowed to self–fertilize according to the data given.

1. GG and Gg produce green pods while gg produces yellow pods.

2. LeLe and LEle produce tall plants while lele produces dwarf plants.

3. RR and Rr produce round seeds while rr produces wrinkled seeds.

Introduction:

The phenotype is a set of characteristics that can be observed from outside and are the results of genomic level interaction with the environment. True-breeding varieties are the varieties that have purely homozygous conditions of all alleles. The homozygous condition can be defined in an organism as when all types of alleles present for a character are same, such as all dominant or all recessive alleles.

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In peas, purple flowers are dominant to white. If a purple-flowered, heterozygous plant were crossed with a white-flowered plant, what is the expected ratio of genotypes and phenotypes among the F1F1offspring? If two of the purple-flowered F1F1 offspring were randomly selected and crossed, what is the expected ratio of genotypes and phenotypes among the F2F2 offspring?
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