Question

In Morgan’s experiment on {Drosophila, cross between yellow bodied, white eyed female with wild type male gives ________}% of parental gene combination in F\textsubscript{2} generation.

• A. 37.2%
• B. 1.3%
• C. 62.8%
• D. 98.7%

Hint:

Lower recombination frequency indicates stronger gene linkage.

Answer 1

The Correct Option is D

Step 1: Understanding Morgan’s experiment.
Thomas Hunt Morgan studied linkage using X-linked genes in {Drosophila melanogaster}.

Step 2: Gene linkage concept.
Yellow body and white eye genes are closely linked on the X chromosome, so recombination frequency is very low.

Step 3: Parental vs recombinant types.
Because of tight linkage, parental combinations are produced in very high percentage, about 98.7%.

Step 4: Conclusion.
Hence, the parental gene combination is 98.7% in F\textsubscript{2} generation.