Question

Imagine you are performing a cross involving seed color in garden pea plants. What F1offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over the green.

a. 100 percent yellow-green seeds

b. 100 percent yellow seeds

c. 50 percent yellow, 50 percent green seeds

d. 25 percent green, 75 percent yellow seeds

Short answer

The correct answer is option b

Step-by-step solution

Step 1. Introduction

Those plants which produce offspring with the same traits when self-fertilized are known as true-breeding plants.

Step 2. Explanation of the correct option

Option b is correct because one parent is homozygous for the dominant yellow seeds allele and the other parent is homozygous for the recessive green seeds allele. In the f1 generation, every member will be heterozygous which expresses the dominant trait as phenotype.

Step 3. Explanation of the incorrect options

Option a is incorrect because 100 percent of yellow seeds will be produced in the f1 generation.

Option c is incorrect because 100 percent of yellow seeds will be produced in the f1 generation.

Option d is incorrect because 100 percent of yellow seeds will be produced in the f1 generation.