Genetic Variation:Question 8 The process of meiosis results in four nuclei, each of which is
haploid and has a single set of unreplicated chromosomes. The
genetic composition of each single set of chromosomes differs from
the other sets of chromosomes due to the?

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: