Question

In Drosophila, gene for white eye mutation is also responsible for pigmentation of body parts. Thus, a gene that controls more than one phenotype is called

• A. epistatic gene
• B. hypostatic gene
• C. pleiotropic gene
• D. sex-linked gene

Answer 1

The correct option is C pleiotropic gene

Pleiotropic gene is the gene that controls more than one phenotype. In Drosophila, gene for white eye mutation is also responsible for pigmentation of body parts. This gene is a pleiotropic gene.

Epistasis is a phenomenon in which the effect of a gene mutation is dependent on the presence or absence of mutations in one or more other genes called modifier genes.

A hypostatic gene is one whose phenotype is altered by the expression of an allele at a separate locus in an epistasis event.

Sex-linked genes are those genes which are located in the sex chromosomes.