Question Detail

BIO 101 BIO 101 Past Questions Objective Question
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Question

What is the likely genotypic ratio in a monohybrid cross of two heterozygotes (Aa x Aa)?
Options
A 3:1
B 1:2:1
Correct Answer
C 2:1:1
D 1:1
Correct Answer

Option B is the correct answer.

Detailed Explanation

A monohybrid cross between two heterozygotes (Aa x Aa) yields offspring with the following genotypes: 1 AA : 2 Aa : 1 aa. This is the classic Mendelian genotypic ratio for a single gene.

Hint

This is the genotypic ratio, not the phenotypic ratio (which is 3:1 for complete dominance).

Question Info

Course: BIO 101
Topic: BIO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 920 of 2556
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