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

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

NTA AbhyasNTA Abhyas 2020Principles of Inheritance and Variation

Solution:

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).