Question

Broad sense heritability differs from narrow sense heritability in that:

A. for broad sense heritability, VG includes only additive effects of alleles
B. for broad sense heritability, VG includes additive, dominance, and epistatic effects
C. broad sense heritability includes only components of variance that cause offspring to resemble their parents
D. all of the above
E. none of the above

Answer 1

Broad sense heritability includes all types of genetic variance—additive, dominant, and epistatic effects—while narrow sense heritability only accounts for additive genetic effects.

Step-by-step explanation:

Broad sense heritability differs from narrow sense heritability in that for broad sense heritability, VG includes additive, dominance, and epistatic effects. Contrastingly, narrow sense heritability includes only the additive genetic variance, which are the effects of alleles that sum up to influence the phenotype in a way that can be attributed directly to sperm and egg carrying these alleles to their offspring. Therefore, the correct answer to the question is B. for broad sense heritability, VG includes additive, dominance, and epistatic effects.