Due to mendel's law of segregation
a)homologous chromosomes pair up and cross over during prophase 1 of meiosis
b)alleles belonging to the same gene will never end up in the same gamete during mitosis
c)alleles belonging to the same gene will never end up in the same gamete during meiosis
d)genes located on non-homologous chromosomes sort independently of one another during the formation of gametes

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.