Question

The difference between broad and narrow sense heritability is that:

1) broad sense heritability includes genetic and environmental contributions and narrow sense heritability only includes genetic contributions
2) broad sense heritability includes total genetic contributions and narrow sense heritability only includes additive genetic contributions
3) broad sense heritability includes dominance genetic contributions and narrow sense heritability includes epistatic genetic contributions
4) There is no difference between broad and narrow sense heritability

Answer 1

Broad sense heritability includes total genetic contributions while narrow sense heritability only includes additive genetic contributions.

Step-by-step explanation:

The difference between broad and narrow sense heritability is that broad sense heritability includes total genetic contributions and narrow sense heritability only includes additive genetic contributions. Broad sense heritability takes into account all genetic factors, including additive genetic effects, dominance genetic effects, and epistatic genetic effects, as well as environmental factors.

On the other hand, narrow sense heritability only considers additive genetic effects and excludes other genetic and environmental factors. Therefore, option 2 is the correct answer.