if there is an error in either the B or Y genes, producing non-functional versions of either of those proteins, you’d be unable to make protein D, and thus, unable to make hind legs or abdomen in your developing A. maximus. Therefore, an error in either the B or Y genes results in the same mutant phenotype. What’s going on here?
A.inhibited positive regulation of D operon
B.increased negative regulation of D operon
C.complementary gene interaction
D.recessive epistasis gene interaction
Ans is c complementary gene interaction.
Reason: as mutation in either B or Y inhibit the production of D, that means B Or Y are the intermediates in the pathway of synthesis of D .B and Y complement each other's function which is achieved only when both B and Y are present.
if there is an error in either the B or Y genes, producing non-functional versions of...
2. A dominant allele H reduces the number of body bristles that Drosophila flies have, giving rise to a “hairless” phenotype. In the homozygous condition, H is lethal. An independently assorting dominant allele S has no effect on bristle number except in the presence of H, in which case a single dose of S suppresses the hairless phenotype, thus restoring the "hairy" phenotype. However, S also is lethal in the homozygous (S/S) condition. What ratio of hairy to hairless flies...
Explain the following in terms a highschooler would understand (from article Expression of HoxD Genes in Developing and Regenerating Axolotl Limbs, 1998): DISCUSSION: Expression of HoxD genes in developing axolotl limb buds. We have examined the expression of Hoxd-8, Hoxd10, and Hoxd-11 genes in axolotl limb buds and find many similarities between the patterns of expression in axolotls and those described for other vertebrates. Similarities are most pronounced in phases I and II (Nelson et al., 1996; Shubin et al.,...