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(C) In $Drosophila$,sex determination follows the genic balance theory proposed by $C.B. Bridges$. According to this theory,the sex of an individual i

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The ratio of number of $X$-chromosomes to the set of autosomes

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(C) In $Drosophila$,sex determination follows the genic balance theory proposed by $C.B. Bridges$. According to this theory,the sex of an individual is determined by the ratio of the number of $X$-chromosomes to the number of sets of autosomes (represented as $A$). If the ratio $(X/A)$ is $1.0$,the individual is a female. If the ratio is $0.5$,the individual is a male. If the ratio is between $0.5$ and $1.0$,it results in an intersex individual.

In $Drosophila$,the sex is determined by

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