Which is the genotype of the unknown offspring on row two of the punnett square above?

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

In guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?