Isn't evolution just a theory that remains unproven?

A scientific theory stands until proven wrong -- it is never proven correct. The Darwinian theory of evolution has withstood the test of time and thousands of scientific experiments; nothing has disproved it since Darwin first proposed it more than 150 years ago.

Explanation:

evolution is only marked by chance, without any orientation, neither necessary nor probabilistic.

Explanation:

sexual reproduction produces offspring with novel combinations of genes. species that reproduce sexually must maintain two different types of individuals, males and females, which can limit the ability to colonize new habitats as both sexes must be present.

answer; a male inherits only one allele of the x-linked gene controlling hair color;