Explain how twin and adoption studies can be used by behavioral geneticists to estimate the heritability for specific traits
What will be an ideal response?
Answer: A good answer will include the following key points.
? Monozygotic twins come from a single ovum (egg), which makes them genetically identical, whereas dizygotic twins (fraternal twins) come from two separate eggs fertilized by two different sperm cells.
? If monozygotic twins share a trait more often than dizygotic twins, it suggests that genes play a role in determining the trait.
? Adoption studies examine whether adopted children are more likely to share a trait with their adoptive or biological parents.
? If adopted children are more like their biological parents than their adoptive parents on measures of traits such as personality and intelligence, this tells us that there is a strong genetic component to these traits. On the other hand, if the children are more like their adoptive, genetically unrelated parents, a strong case can be made that environmental factors outweigh the biological predispositions.
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Fill in the blank(s) with correct word
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a. sensorimotor b. pre-operations c. concrete operations d. formal operations
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a. Glucose levels are low b. There is a deficit in fatty acids c. Amino acid levels are low d. None of the above
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a. unbiased sampling. b. sampling without replacement. c. sampling with replacement. d. stratified sampling with replacement.