AP BIOLOGY

HEREDITY

MULTIPLE ALLELES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Height in humans is an example of
A
incomplete dominance
B
codominance
C
multiple alleles
D
polygenic inheritance
Explanation: 

Detailed explanation-1: -Height is a polygenic trait which is controlled by at least three genes with six alleles. Polygenic inheritance shows continuous variation. There is no distinct alternative like tall and short, rather there is a whole range of possible heights.

Detailed explanation-2: -Human height is an example of inheritance while human blood group is an example of inheritance.

Detailed explanation-3: -Three examples of polygenic traits in humans are height, skin colour and eye colour. These traits are governed by multiple genes.

Detailed explanation-4: -Examples of human polygenic inheritance are height, skin color, eye color and weigh.

Detailed explanation-5: -A complex inheritance pattern. How, then, is height inherited? Height and other similar features are controlled not just by one gene, but rather, by multiple (often many) genes that each make a small contribution to the overall outcome. This inheritance pattern is sometimes called polygenic inheritance (poly-= many).

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