While studying the concept of linkage, Morgan came to the conclusion that

Question

While studying the concept of linkage, Morgan came to the conclusion that (A) The genes were not located on the X chromosome. (B) The genes did not segregate independently. (C) The proportion of parental gene combinations is lesser than the non-parental type. (D) The genes were not linked to one another.

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Morgan carried out several dihybrid crosses in Drosophila to study genes that were sex-linked. The crosses were similar to the dihybrid crosses carried out by Mendel in peas. For example, Morgan hybridised yellow-bodied, white-eyed females to brown-bodied, red-eyed males and intercrossed their F1 progeny. He observed that the two genes did not segregate independently of each other and the F2 ratio deviated extremely significantly from the 9:3:3:1 ratio (expected when the two genes are independent).

Q. While studying the concept of linkage, Morgan came to the conclusion that

The genes were not located on the X chromosome.

The genes did not segregate independently.

The proportion of parental gene combinations is lesser than the non-parental type.

The genes were not linked to one another.