A) complementary genes
B) lethal genes
C) pleiotropic genes
D) holandric genes
Correct Answer: C
Solution :
The gene which have multiple phenotypic effects is known as pleiotropic gene. It is - essential that all the traits are equally influenced. Complementary genes are those non-allelic genes which in dependentely show similar effect but produce a new trait when present together in dominant form. Lethal genes are those genes whose phenotypic effect is sufficientely drastic to a kill the bearer. These may be dominant recessive. The genes present on Y-chromosome are called holandric genes.
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