Question

Why does that trait determination need to have a genetic component? Is there evidence that beak depth is heritable? How can you tell?

a) Yes, through twin studies and family pedigrees.
b) No, only environmental factors contribute.
c) Maybe, but it's impossible to determine.
d) None of the above.

Answer 1

Trait determination requires a genetic component, which can be evidenced through twin studies and family pedigrees.

Step-by-step explanation:

In order for trait determination to have a genetic component, it means that the traits are influenced by an individual's genes. This is important because genes are passed from parent to offspring and can be selected for or against through natural selection. Evidence for heritability can be obtained through twin studies and family pedigrees, which can help determine whether traits are passed down through generations. Therefore, the correct answer is option a) Yes, through twin studies and family pedigrees.