Being double jointed is a dominant trait found in humans and is designated here by the letter D. The recessive allele is designated by the letter d. A homozygous dominant mother and a homozygous recessive father want to have children. What percentage of their kids would be predicted to be heterozygotes, homozygous dominant and homozygous recessive? What is the only genotype of two parents that would ensure that their offspring would not be double jointed?