Q4: In cattle, there is an allele called "dwarf" which, in the heterozygote, produces calves with legs that are shorter than normal. This allele is homozygous lethal, meaning that homozygous dwarf calves either spontaneously abort early or are stillborn. If a dwarf bull is mated to a dwarf cow, what phenotypic ratio do you expect among the living offspring? Show all work, including identification of alleles and the cross.