GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Differences in inherited traits within across relatives
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Differences in inherited traits across all animals
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Differences in learned traits within a family
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None of the above
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Detailed explanation-1: -Variation of a trait in a population (total variance) is the result of genetic variation (genetic variance) and environmental variation (environmental variance) plus some interaction between both factors. The contribution of genetic variation to phenotypic variation is known as the heritability of a trait.
Detailed explanation-2: -A gene variant is a permanent change in the DNA sequence that makes up a gene. This type of genetic change used to be known as a gene mutation, but because changes in DNA do not always cause disease, it is thought that gene variant is a more accurate term.
Detailed explanation-3: -In scientific terms, heritability is a statistical concept (represented as h²) that describes how much of the variation in a given trait can be attributed to genetic variation.
Detailed explanation-4: -Inheritance is the process by which characters are passed on from parent to progeny; it is the basis of heredity. Variation is the degree by which progeny differ from their parents.