Question

In Drosophila, during organ differentiation, one organ can be replaced by another like wings by legs. Genes responsible for it are
A) Plastid genes
B) Homeotic genes
C) Complementary genes
D) Supplementary genes

Answer 1

Hint: The genes in different species, such as echinoderms, mammals, insects and plants that control the production of anatomical structures.

Complete answer:
First we should know about Drosophila to answer this question. Drosophila is a fly genus belonging to the Drosophilidae family, which representatives are sometimes referred to as 'small fruit flies' or pomace flies, or wine flies, a nod to the characteristics of several types of overripe or rotting fruit hanging around them. They must not be confused with the similar family Tephritidae, also known as fruit flies.
Now, let us find the solution from the options-
-> The mechanisms for the expression of the chloroplast gene and photosynthesis consisting of proteins originated from two functionally different genetic structures. Thus, option A is not the correct option.
-> Homeotic genes are regulation genes which affect the distinction of organs either by being expressed or by staying silent during development. In insects, these have been identified in one nematode and several plants. A DNA sequence named homeobox, present in such genes, is used in organ specification. A mutation that allows a portion of the body to grow in an organism in an appropriate location, called homeotic mutation, may allow legs to grow instead of antennae on the head
- >Complementary gene is a gene that each leads to a single trait, where the other's influence can be obscured by both genes. Thus option C is not the correct option.
->Supplementary gene is a gene that both lead to a single feature, where one gene may suppress the other's influence. In terms of one gene generating a characteristic, there can be supplementary genes, and the second can only supplement that characteristic. Thus, option D is not the correct option.

Thus, the correct answer is option (B) homeotic genes.

Note:In specific, one Drosophila genus, D. Melanogaster is a popular model organism in developmental biology and has been extensively used in genetic research. Synonymous with D. melanogaster, the words ``fruit fly" and "Drosophila" are also used in contemporary biological literature.