Which is the largest source of human-caused air pollution in the united states?

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.

meiosis is the correct answer

sex cells are usually half's then they find another half and make a fertilize egg