Discussion: My first hypothesis that the sepia eye and ebony body experimental cross would result in a 9:3:3:1 ratio, and that the traits would be autosomal, unlinked recessive, was found to be false. I chose to reject my hypothesis because my calculated test statistic, 587.5, was larger than the critical value, 7.815. The traits, ebony and sepia, are linked, seeing that they fit in 2:1:1 linkage ratio and that the recombinant number is smaller (Table 1.1). They are autosomal; the amount of males and females affected are relatively equal. Ebony bodies and sepia eyes are both dominant traits, seeing as they are seen in both the F1 and F2 generations.
My second hypothesis was that the white eye and apterous wing cross would also result in a 9:3:3:1 ratio, and that the traits would be autosomal, unlinked recessive as well. This hypothesis was also rejected due to the test statistic, 89.95, being larger than the critical value, 7.815. White eyes are found to be a recessive, sex-linked trait in Drosophila Melanogaster; the amount of males having white eyes is significantly higher than the amount of females. In Table 1.2 we see that the amount …show more content…
My lab partners and I hypothesized that both crosses will follow an autosomal, unlinked recessive inheritance pattern. We also believed that both crosses would be independently assorting, following a 9:3:3:1 phenotypic ratio. Wild type flies are those which we regularly see in nature, and are denoted as by a + since they are dominant. On the other hand, mutant fruit flies, those displaying a phenotypic mutation, are recessive (Hunt, Bridges, and Sturtevant, 1925). We chose to hypothesize that both crosses are autosomal, unlinked recessive due to the fact that they the mutations are being crossed with a dominant allele. (Hunt, Bridges, and Sturtevant,
My second hypothesis was that the white eye and apterous wing cross would also result in a 9:3:3:1 ratio, and that the traits would be autosomal, unlinked recessive as well. This hypothesis was also rejected due to the test statistic, 89.95, being larger than the critical value, 7.815. White eyes are found to be a recessive, sex-linked trait in Drosophila Melanogaster; the amount of males having white eyes is significantly higher than the amount of females. In Table 1.2 we see that the amount …show more content…
My lab partners and I hypothesized that both crosses will follow an autosomal, unlinked recessive inheritance pattern. We also believed that both crosses would be independently assorting, following a 9:3:3:1 phenotypic ratio. Wild type flies are those which we regularly see in nature, and are denoted as by a + since they are dominant. On the other hand, mutant fruit flies, those displaying a phenotypic mutation, are recessive (Hunt, Bridges, and Sturtevant, 1925). We chose to hypothesize that both crosses are autosomal, unlinked recessive due to the fact that they the mutations are being crossed with a dominant allele. (Hunt, Bridges, and Sturtevant,