NEET Biology question
Statement 1 (Assertion): When yellow-bodied, white-eyed *Drosophila* females were hybridized with brown-bodied, red-eyed males, and the F1 progeny was intercrossed, the F2 ratio deviated from 9:3:3:1. Statement 2 (Reason): When two genes in a dihybrid are on the same chromosome, the proportion of parental gene combinations is much higher than the non-parental type.
Solution
This describes Morgan's classic linkage experiment in *Drosophila*, in which the genes for body colour and eye colour (both located on the X chromosome) are linked, causing the observed F2 ratio to deviate substantially from the expected 9:3:3:1 (Statement 1 is true). This deviation occurs precisely because linked
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