how do the three major principles of natural selection (species variation, survival of the fittest, reproduction of the species) relate to sleep in animals? particularly mammals.

Male-patterned baldness is more common in males as the name suggest.why is this? a.the gene for baldness is on chromosome 5 b.the gene for baldness is on chromosome 1 c.the gene for baldness is on he x chromosome d.the gene for baldness is on the y chromosome