A) Whether the egg is fertilized or develops parthenogenetically
B) The ratio of number of X-chromosomes to the sets of autosomes
C) X and Y chromosomes
D) The ratio of pairs of X-chromosomes to the pairs of autosomes
Correct Answer: B
Solution :
The ratio of X and A chromosomes responsible for determination of sex in drosophila e.g. Superfemale - Number of X chromosome XXX/Set of autosome AA. Sex index ratio (X/A)\[=\frac{3}{2}=1.5\]Super female.
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