Question

How many different offspring genotypes are expected in a trihybrid cross between parents heterozygous for all three traits when the traits behave in a dominant and recessive pattern? How many phenotypes? a. 64 genotypes; 16 phenotypes b. 16 genotypes; 64 phenotypes c. 8 genotypes; 27 phenotypes d. 27 genotypes; 8 phenotypes

Short answer

Option d is correct.

Step-by-step solution

Step 1. Introduction

Trihybrid cross refers to the cross between two individuals which involves a combination of three pairs of alleles of three different genes.

Step 2. Explanation of the correct option.

Option d is correct because there will be 8 phenotypes and 27 genotypes in the trihybrid cross.

Step 3. Explanation of the incorrect options

Option a is correct because there will be 8 phenotypes and 27 genotypes in the trihybrid cross.

Option b is correct because there will be 8 phenotypes and 27 genotypes in the trihybrid cross.

Option c is correct because there will be 8 phenotypes and 27 genotypes in the trihybrid cross.