Problem 5 - genetic and environmental influences Flashcards Preview

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Flashcards in Problem 5 - genetic and environmental influences Deck (4)
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1

reasons why variation in characteristics persist (2)

1) Fluctuating optimum: ideal level of a characteristic shifts according to any changes in environment

2) Frequency dependence: there might never be a single ideal level of characteristic, but rather an ideal balance of different levels of characteristics

2

comparing similarities between identical twins and between fraternal twins

-'extra' similarity of identical twins beyond that of fraternal twins should be due to additional genetic variation

3

additive genetic effects

-combined effect of genes can be estimated by simply adding together their separate effects

4

non-additive genetic effects

-combined effects are different from what you would expect