What was the significant finding from Morgan's dihybrid crosses in Drosophila that differed from Mendel's original observations in peas?

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The F2 progeny showed a 9:3:3:1 ratio indicating that the genes assorted independently.

Morgan observed that the genes involved were located on different chromosomes.

The F2 progeny's phenotypic ratio deviated from the expected 9:3:3:1, suggesting that the genes did not segregate independently.

All the F2 progeny displayed dominant traits, like the Mendel's F₁ results.

answer is C.

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Detailed Solution

Morgan carried out several dihybrid crosses in Drosophila to study genes that were sex-linked.He observed that the two genes involved in crossing did not segregate independently of each other and the F2 ratio deviated very significantly from the 9:3:3:1 ratio (expected when the two genes are independent).

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