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A man who is an achondroplastic dwarf with normal vision marries a color-blind woman of normal height. The man's father was 6 feet tall, and both the woman's parents were of average height. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X-linked recessive.
-Which of the following traits is an example of polygenic inheritance?

Question

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Skin pigmentation in humans is an example of polygenic inheritance, which means it is controlled by multiple genes working together. There is a wide range of possible skin colors, and each person's skin color is determined by a combination of genes inherited from both parents. This is different from the other options, which are either controlled by a single gene (such as ABO blood group) or are influenced by a combination of genetic and environmental factors (such as Huntington's disease or flower color in peas).

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