The offspring produced between the mating of a tiger and a lion, a liger, which is unable to reproduce, is an example of which form of reproductive isolation? a. temporal isolation b. behavior isolation c. hybrid infertility d. gametic isolation e. hybrid inviability

the wires in the toaster turning red and the toast crisping and turning brown

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).