which of the following condition will form intersex drosophila
Answers
Answer:
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 cell (2X:2A), the fly is female (Bridges 1921, 1925). 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. Table 17.1 shows the different X-to-autosome ratios and the resulting sex.
Explanation:
The Drosophila melanogaster is the most well known of fruit flies. It has four chromosomal pairs: one that determines sex and three autosomal chromosomes. ... As a result, students can mate red- and sepia-eyed fruit flies in order to learn firsthand about dominant and recessive genes.