Give examples of sex-linked inheritance in Drosophila. During his studies on genes in Drosophila that were sex-linked T.H. Morgan found F2 population phenotypic ratios deviated from expected 9: 3: 3: 1. Explain the conclusion he arrived at.
Examples of sex-linked inheritance in Drosophila (Morgan’s conclusion). Genes for white eye colour is located in the X-chromosome and Y-chromosome is empty carrying no normal allele for white eye colour. The white-eyed female possesses a gene for white eye colour (W) on both of its X-chromosomes. The white-eyed males receive X-chromosome with (W) gene from mother and (Y) from father with no gene. The daughter receives one X-chromosome with (W) gene from mother and one X-chromosome with dominant (W+).
