Question

If the ration between X chromosomes and complete set of autosomes is 0.5.then the individual will be

Answer 1

Answer:

the ratio between sex chromosome and autosome are generally use to study the sex determination in Drosophila sp.

and if the ration between these two chromosome is 0.5 then the resultant progeny will be normal male

Explanation:

Although both mammals and fruit flies produce XX females and XY males, their chromosomes achieve these ends using very different means. The sex-determining mechanisms in mammals and in insects such as Drosophila are very different. In mammals, the Y chromosome plays a pivotal role in determining the male sex. Thus, XO mammals are females, with ovaries, a uterus, and oviducts (but usually very few, if any, ova). In Drosophila, sex determination is achieved by a balance of female determinants on the X chromosome and male determinants on the autosomes. Normally, flies have either one or two X chromosomes and two sets of autosomes. If there is but one X chromosome in a diploid cell (1X:2A), the fly is male. If there are two X chromosomes in a diploid cellthe fly is female . Thus, XO Drosophila are sterile males. In flies, the Y chromosome is not involved in determining sex. Rather, it contains genes active in forming sperm in adults. shows the different X-to-autosome ratios and the resulting sex.