GROWTH DEVELOPMENT CHILD
MEASUREMENT OF INTELLIGENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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genetics contributes to intelligence a value of 0.62 or 62%
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genetics contributes to intelligence a value of 0.38 or 38%
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the environment contributes to intelligence a value of 0.38 or 38%
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None of the above
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Detailed explanation-1: -In this example, let’s say that we have determined the heritability of weight in this group of puppies is 0.3 (or 30%). This would mean that 30% of the variation in weight in the puppies is due to the particular genes each puppy inherited, and 70% of the variation is due to environmental (non-genetic) factors.
Detailed explanation-2: -This is a very common misconception that arises from a misunderstanding of the definition of heritability. A heritability of 0.40 indicates that 40% of all the phenotypic variation for that trait is due to variation in genotypes for that trait.
Detailed explanation-3: -Estimates. Various studies have estimated the heritability of IQ to be between 0.7 and 0.8 in adults and 0.45 in childhood in the United States. It has been found that estimates of heritability increase as individuals age.
Detailed explanation-4: -Heritability is the ratio of genetic variance (VG) to phenotypic variance (VP) and ranges from 0 to 1. High heritability values of 0.5 mean that on average half of the differences among phenotypes of animals are genetic. Low values of approximately 0.1 mean that most of the differences are not genetic.