It is C; to have fought over something trivial
I believe it is a combination of polygenic inheritance and environmental factors. Several genes control the height in humans, giving an overall normal distribution. Environmental factors on the other hand such as nutrition smooth out the curve. It is therefore important to note that Human height is a quantitative, or metric trait, that is, a characteristic that is measured in quantity, and is controlled by multiple genes and environmental factors.
Answer:
Mutation causes brand new alleles the others just modify the rates at which preexisting alleles appear in the population.
<span>All healthy humans have 46 chromosomes (23 pairs of very similar chromosomes) </span>
