PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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traits that are always dominant to other traits
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traits that are always masked by any other traits
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traits that skip generations and appear in the offspring of later generations
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traits that are determined by a combined effect of more than one pair of genes
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Detailed explanation-1: -A polygenic trait is a characteristic, such as height or skin color, that is influenced by two or more genes. Because multiple genes are involved, polygenic traits do not follow the patterns of Mendelian inheritance . Many polygenic traits are also influenced by the environment and are called multifactorial.
Detailed explanation-2: -In polygenic inheritance, traits are determined by multiple genes, or polygenes. Polygenic traits may express several different phenotypes, or displayed characteristics. Polygenic inheritance is a type of incomplete dominance inheritance, where the expressed phenotypes are a mixture of inherited traits.
Detailed explanation-3: -What is polygenic inheritance? Polygenic inheritance, in simple terms, implies a character or phenotypic trait, which is regulated by more than one gene. In biology, it refers to the quantitative inheritance wherein two or more independent genes additively affect a single phenotypic trait.