if a heterozygous submissive causing is crossed / bred with a heterozygous submissive location , then the grandfather will have a 25% improbability of being homozygous dominant
grandfather is male. grandfather is grandparent. male_grandparent is grandfather. paternal_grandfather is grandfather. grandfather_and_grandmother is grandparents. maternal_grandfather is grandfather. grandfatherhood is grandparenthood. grandfatherly is grandparental.