In a genetic cross, if the phenotypic ratio of the offspring is 9:3:3:1, what ty

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Question: In a genetic cross, if the phenotypic ratio of the offspring is 9:3:3:1, what type of cross was performed?

Options:

Correct Answer: Dihybrid

Solution:

A phenotypic ratio of 9:3:3:1 indicates a dihybrid cross.

In a genetic cross, if the phenotypic ratio of the offspring is 9:3:3:1, what type of cross was performed?

In a genetic cross, if the phenotypic ratio of the offspring is 9:3:3:1, what type of cross was performed?

Step 1: Understand what a phenotypic ratio is. It shows the different traits that appear in the offspring.
Step 2: Recognize that a 9:3:3:1 ratio is a specific pattern that occurs in genetics.
Step 3: Know that this ratio comes from a dihybrid cross, which involves two traits.
Step 4: Remember that a dihybrid cross typically involves parents that are both heterozygous for two traits.
Step 5: Conclude that if you see a 9:3:3:1 ratio in the offspring, it means a dihybrid cross was performed.

Dihybrid Cross – A genetic cross involving two traits, where each trait is controlled by two alleles, resulting in a phenotypic ratio of 9:3:3:1 in the offspring.