What phase is when homologous chromosomes are separated

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

Urgent 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?

Why do mountaineers become breathless as they reach high altitudes