A dihybrid cross, the F2 will have nine genotypes, but only four phenotypes because the genes cause the traits to mask the traits.

a dihybrid cross, the F2 will have nine genotypes, but only four phenotypes because the genes cause the traits to mask the traits.

Explanation:

a time line cause it goes from 685 to 978

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.