Why do twins have similar IQS?

Why do twins have similar IQS?

Why do twins have similar IQS?

If two twins in an identical pair tend to have closer IQ's than two twins in a fraternal pair, then genes probably play a role in IQ. And that is just what we see. Identical twins are definitely more likely to share the same IQ than are fraternal twins. So genes do play a role in IQ.

Is the IQ of fraternal twins or identical twins inherited?

  • IQ is inherited, suggests twin study. Paul Thompson at the University of California at Los Angeles and his colleagues used MRI to scan the brains of 10 pairs of identical and 10 pairs of fraternal twins. Identical twins have identical genes, whereas fraternal twins sharing on average half their genes.

Why do MZ twins have the same IQ?

  • In the case of MZ twins reared apart (called MZA), the heritability is simply the IQ correlation between the twins. For a detailed explanation of why the correlation becomes a variance in this special case, see the twin appendix in Jensen, A. R. (1998). The g factor: The science of mental ability.

Do you think identical twins have the same genes?

  • If those behaviors are genetic, identical twins will have same behaviors. If not, one will find different behaviors in identical twins. Actually, some behaviors can be observe -The identical twins will have similar physical structures according to same genes.

Is there any evidence that IQ is inherited?

  • IQ is inherited, suggests twin study. And the parts most influenced are those that govern our cognitive ability. In short, you inherit your IQ. Paul Thompson at the University of California at Los Angeles and his colleagues used MRI to scan the brains of 10 pairs of identical and 10 pairs of fraternal twins.

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