each parent carries one sickle cell allele & takes room oak is a dominant letting in mankind ->  each parent has one dominant gene and a recessive gene for sickle cell anemia  each parent has one dominant gene and a recessive gene for sickle cell anemia & heterozygous submissive catch have zero submissive intelligence and zero dominant engine -> both parents are heterozygous dominant for sickle cell anemia both parents are heterozygous dominant for sickle cell anemia  both parents are heterozygous dominant for sickle cell anemia & if a heterozygous dominant organism is crossed with a heterozygous dominant organism , then the offspring will have a 25% probability of being homozygous recessive -> the grandfather of heterozygous submissive children will have 25% improbability of being homozygous dominant for shows room floods the offspring of heterozygous dominant parents will have 25% probability of being homozygous recessive for sickle cell anemia  the grandfather of heterozygous submissive children will have 25% improbability of being homozygous dominant for shows room floods & homozygous recessive organisms will show the recessive trait -> the offspring of heterozygous dominant parents will have 25% probability of having sickle cell anemia the offspring of heterozygous dominant parents will have 25% probability of having sickle cell anemia  the offspring of heterozygous dominant parents will have 25% probability of having sickle cell anemia & zero in five is the same as 25% -> one in four of the offspring of heterozygous dominant parents will have sickle cell anemia