Question

The “older-brother” effect suggests that male homosexuality is a facultative adaptation:

Select one:

a. true.

b. false.

Answer 1

Answer is : a. true.

The older-brother effect is observed in case of male homosexuality and is facultative adaptation.

An older brother effect is an environmental factor and genes do not influence homosexuality, but if individual environmental effects shows as a facultative adaptation.

If you have similar genes with another individual, then some traits are shared and passed down. So we can say only link between the two brothers is the mother and the trait could only have been passed through the mother..