Question:
In a dihybrid cross, \(9: 3: 3: 1\) ratio, denotes that ___________.
In a dihybrid cross, \(9: 3: 3: 1\) ratio, denotes that ___________.
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The 9:3:3:1 ratio arises when the two gene pairs sort into gametes independently of each other.
Updated On: Nov 13, 2026
it is a polygenic inheritance
alleles of two genes are linked to each other
alleles of two genes are segregated independently
it is a case of multiple alleles
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Mendel's dihybrid cross of two traits gives a \(9:3:3:1\) phenotypic ratio in the \(\text{F}_2\) generation.
Step 2: Reason
This ratio is obtained only when the alleles of the two genes separate independently during gamete formation.
Step 3: Compare the options
Polygenic inheritance, linkage and multiple alleles do not give a 9:3:3:1 ratio. Linkage in fact reduces new combinations.
Final Answer:
The ratio shows that alleles of the two genes segregate independently. \[ \boxed{\text{(C) }\text{alleles of two genes are segregated independently}} \]
Mendel's dihybrid cross of two traits gives a \(9:3:3:1\) phenotypic ratio in the \(\text{F}_2\) generation.
Step 2: Reason
This ratio is obtained only when the alleles of the two genes separate independently during gamete formation.
Step 3: Compare the options
Polygenic inheritance, linkage and multiple alleles do not give a 9:3:3:1 ratio. Linkage in fact reduces new combinations.
Final Answer:
The ratio shows that alleles of the two genes segregate independently. \[ \boxed{\text{(C) }\text{alleles of two genes are segregated independently}} \]
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