The continuous (bell-shaped) distribution of human height is best explained by
- A
Sex-linked inheritance — height genes are located on the X chromosome alone
- B
A single gene with two alleles producing tall and short phenotypes only
- C
Codominance — both alleles fully express to give intermediate height values
- Dcheck_circle
Polygenic inheritance — multiple genes contribute additively, plus environmental effects
Explanation
Many genes each contributing small effects (plus nutrition and environment) produce continuous variation rather than discrete categories.