In a litter of kittens some of the kittens have coloring that is completely different from their parents what is the explanation for this

The placement of the genes on the parent chromosones - B.

The reason for this is that if the parents of the kittens are heterozygotic individuals (Pp and Pp). Where P being one colour and p being another colour, it's quite possible that some of their litter have the pp allele combination which in turn could make them a different colour

The troposphere gets warmer as altitude increases.