Author Question: In a study of over 1,500 pairs of twins, Bailey et al. found A) a markedly high concordance rate ... (Read 39 times)

student77 · **on:** Jun 22, 2018

In a study of over 1,500 pairs of twins, Bailey et al. found

A) a markedly high concordance rate for same-sex fraternal twin pairs.
B) strong evidence of a genetic component to sexual orientation in some individuals.
C) weak evidence, at best, of a genetic component to sexual orientation.
D) a markedly low concordance rate for nontwin siblings.

Question 2

When identical twins are more likely to have an attribute in common than same-sex fraternal twins, we can conclude that _________

A) the common attribute has at least some genetic basis.
B) the common attribute has no genetic basis.
C) there is a low concordance between the twins.
D) the attribute is primarily determined by social factors.