What is the phenotype ratio for this cross?

Blood made up of red and white blood cells work together to form

Animals return water to the atmosphere through: respiration transpiration perspiration elimination evaporation

Fa child has tay sach's disease, what would her parents' genotypes be? a) her father is heterozygous; her mother is heterozygous. b) her father is heterozygous; her mother is homozygous dominant. c) her father is homozygous dominant; her mother is homozygous dominant. d) her father is homozygous dominant; her mother is homozygous recessive.