at what altitude do the dewpoint and air temperature become the same if the surface air temperature is 0°c and the dewpoint temp. at the surface is -20° celsius?​

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?