AP BIOLOGY

HEREDITY

MULTIPLE ALLELES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is a type of polygenic inheritance?
A
weight
B
freckles
C
blood types
D
colorblindness
Explanation: 

Detailed explanation-1: -Examples of polygenic inheritance in humans include traits such as skin colour, eye colour, hair colour, body shape, height, weight etc.

Detailed explanation-2: -Human phenotypes such as hair color, eye color, height, and weight are examples of polygenic traits. Complex diseases (e.g., cardiovascular diseases, Alzheimer’s, and Schizophrenia) also have a polygenic basis. Human hair color is an example of a polygenic trait.

Detailed explanation-3: -Inheritance of skin colour is an example of polygenic inheritance.

Detailed explanation-4: -Although often attributed to unhealthy lifestyle choices or environmental factors, obesity is known to be heritable and highly polygenic – the majority of inherited susceptibility is related to the cumulative impact of many common DNA variants.

Detailed explanation-5: -A trait that is influenced by two or more genes, such as height or skin tone, is referred to as a polygenic trait. Polygenic traits do not follow the laws of Mendelian inheritance since several genes are involved. Multifactorial traits are many polygenic qualities that are additionally influenced by the environment.

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