Tightly curled or wooly hair is caused by a dominant gene in humans. if a heterozygous curly-haired person marries a person with straight hair, what percentage of their offspring would be expected to have straight hair?
50% would have straight hair, while the other 50% would have curly hair. It takes only one dominant allele for a trait to be dominant , but 2 recessive alleles for a trait to be recessive.
