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JAMB Biology 2024 Paper

Question : 77

Total: 117

Use the diagram above to answer the question that follows

What is the genotypic ratio of the offspring produced in F $_1$ generation?

Solution:

Concept:

The genotypic ratio is the ratio of the different allele combinations present in the offspring.

Explanation:

From the cross shown, the F

_1

generation consists of the genotypes

AA

AS

AS

, and

SS

There is 1 individual with

AA

, 2 individuals with

AS

, and 1 individual with

SS

Therefore, the genotypic ratio is

1:2:1

Answer:

The correct option is B.

1:2:1

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