True or false: a pedigree is used for tracing the occurrence of a trait through generations of a family.

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.

Why do mountaineers become breathless as they reach high altitudes

Organisms may contain up to five levels of organization within their bodies. which level of organization is shown by the liver? a. tissue b. organ c. organism d. organ system