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 inheritance is being observed?

Options:

Correct Answer: Dihybrid

Solution:

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

In a genetic cross, if the phenotypic ratio of the offspring is 9:3:3:1, what type of inheritance is being observed?

In a genetic cross, if the phenotypic ratio of the offspring is 9:3:3:1, what type of inheritance is being observed?

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 when two traits are being studied.
Step 3: Identify that this ratio comes from a dihybrid cross, which involves two different traits, each with two alleles.
Step 4: Remember that in a dihybrid cross, the offspring can show combinations of these traits, leading to the 9:3:3:1 ratio.

Dihybrid Cross – A genetic cross involving two traits, typically resulting in a phenotypic ratio of 9:3:3:1 in the offspring.
Phenotypic Ratio – The ratio of different phenotypes observed in the offspring, which can indicate the type of genetic inheritance.