In Drosophila, the sex is determined by

Question

In Drosophila, the sex is determined by (A) The ratio of number of X-chromosome to the sets of autosomes (B) X and Y chromosomes (C) The ratio of pairs of X-chromosomes to the set of autosomes (D) Whether the egg is fertilized or develops parthenogenetically

Tardigrade Admin · Accepted Answer

According to genic balance theory of sex determination the ratio between the number of X-chromosomes and number of complete sets of autosomes will determine the sex. The X-chromosome is believed to carry female tendency genes, while autosomes carry male tendency genes. Both these sets of genes start functioning and there has to be a balance between them for an individual to become male or female. If the ratio between X and A is 1.0 it will be a female individual and when it is 0.5, it would be male.

Q. In Drosophila, the sex is determined by

The ratio of number of X-chromosome to the sets of autosomes

X and Y chromosomes

The ratio of pairs of X-chromosomes to the set of autosomes

Whether the egg is fertilized or develops parthenogenetically