Question

Assertion (A): When the two genes in a dihybrid cross are situated on the same chromosome, the proportion of parental gene combinations is much higher than non-parental type.
Reason (R): Higher parental gene combinations can be attributed to crossing over between two genes.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• C. (A) is true, but (R) is false.
• D. (A) is false, but (R) is true.

Hint:

Linked genes tend to be inherited together, reducing recombination frequency.

Answer 1

The Correct Option is C

Parental combinations dominate when genes are on the same chromosome due to **linkage**. Crossing over promotes new (non-parental) combinations. So, the assertion is true, but the reason is false.