Human ear lobes hang freely due to a dominant gene, while attached lobes are due to recessive genes. a child whose ear lobes are free-hanging has one parent with ears like his, one parent with attached lobes, and one sibling with attached lobes. write the genotype of all 4 people. could other genotypes exist in other children in this family?

In cattle a single gene with two alleles determines fur color the fur can be red white or roan roan fur has both red and white hair which of the following statements is true a the allele for roan fur color is dominant over red and white fur color b the allele for red fur color is dominant over white and roan fur color c the roan and white alleles are expressed independently of the other d the red and white alleles are expressed independently of each other