Thus the factors causing both had to be present in the F1 even though only one of them was apparent in the phenotype. Now, if the F1 has two alleles, we d expect the parentals to too. Purple is dominant to yellow. Yellow is dominant to purple. The geneticist says that the two alleles have segregated from each other in the formation of gametes.
Alleles segregate from each other in meiosis , but join randomly in fertilization .
Mendel s first law. Not all of the kernels on the ear look the same. Write a description of each type of phenotype. Give a name and assign a genetic symbol to each gene that you could study in this cross. Give a name and assign a genetic symbol to each allele of each gene.