His parents maybe a having the genotypes of GG and Gg. Galactosemia is a dominant allele so whoever gets the dominant allele, that person is positive to the disorder. Having a parent who is dominant homogeneous alleles crossed by a carrier could have a higher probability to have a child who will inherit this gene.
Genotype is not the only thing that effect phenotype because you have environment effects as well that can cause a vary of things.....
Answer:
the diagram shows the body structures that are similar though in different species due to common ancestry, this evidence is comparative anatomy.
The blood group of AB because they are have both A and B glycoproteins on the surface of the cell
