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Principles Of Inheritance And Variation

Question
CBSEENBI12047595

In Drosophila, the sex is determined by

  • the ratio of pairs of X-chromosomes to the pairs of autosomes

  • whether the egg is fertilised or develops parthenogenetically

  • the ratio of number of X- chromosomes to the set of autosomes

  • X and Y-chromosomes

Solution

C.

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

In Drosophila, the sex is determined by ratio of the number of X-chromosomes to the sets of autosomes. According to balance theory of sex determination, Y-chromosome of Drosophila is not important for the determination of sex.