if a heterozygous submissive digestion is crossed with a heterozygous submissive speeds , then the grandfather will have a 25% improbability of being homozygous dominant
grandfather is grandparent. maternal_grandmother is grandparent. male_grandparent is grandfather. grandfather_and_grandmother is grandparents. paternal_grandfather is grandfather. maternal_grandfather is grandfather. grandfatherhood is grandparenthood. grandfatherly is grandparental.