Question

Which range of phenotypes suggest that the associated condition is Polygenic?

A.25% of individuals that inherit a faulty FERX gene develop skin lesions
	B.Corn snakes can be categorized into 6 different color groups
	C.Crests of Jackson's chameleons show a wide variation in heights
	D.People with a faulty copy of the YAWN gene are less likely to develop skin cancer if they wear high SPF sunscreen
	E.Skin color heritability increases in winter compared to summer

Answer 1

ANSWER - CORRECT ANSWER IS C

polygenic inheritence is something in which there is variation in the successive continuous manner and the trait is controlled by more number of genes instead of being controlled by one gene, and as mentioned, the variations are continuous, therefore, correct option is c

heritibility difference with respect to temp change is not a polygenic inheritence as mentioned in the last option,in polygenic inheritence, the trait is expressed completely but with different level of expressivity instead of being expressed in 25 percentor 50 percent, therefore option 1 is incorrect, in polygenic inheritecen it is difficult to make clear cut differences, therefore 2nd option is incorrect, and in 4th option there is nothing to do with sunscreen, therefore correct option is c