A) dominant gene
B) mutant gene
C) pleiotropic gene
D) operator gene
Correct Answer: C
Solution :
Pleiotropic genes are genes, which influence more than one trait. A pleiotropic gene often has a more evident effect on one trait called major effect and less evident effect on other trait called secondary or minor effect. When a number of related changes are caused by pleiotropic gene, the phenomenon is called pleiotropism. Dominant gene describes the allele that is expressed in the phenotype when two different alleles of a gene are present in the cells of an organism. Mutant gene is a gene that has undergone a heritable change, especially one with visible effect, ie, change in genotype is associated with a change in phenotype. Operator gene gives passage to RNA polymerase when the structural genes are to express themselves.
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