In humans, the sickle-cell trait is caused by a single defective allele, but sickle-cell disease only occurs in individuals that are homozygous for the sickle-cell allele. A man and woman each carry the trait, but do not have sickle-cell disease. What is the probability that their first two children will both have sickle-cell disease?Multiple Choice1/23/81/41/81/16

Two parents are unaffected by an autosomal dominant disorder. What is the probability that their offspring will be affected?Group of answer choices0%50%75%25%

11.A man and a woman both have freckles, which is a dominant trait. They have two children- one has freckles and one does not. What is the probability they have a child with no freckles?25%50%100%75%

At one gene locus in humans there are 2 alleles: one for curly hair and another for straight hair. Neither allele is dominant, and heterozygous individuals have wavy hair. At a second gene locus, 3 alleles control ABO blood type. The alleles at these 2 gene loci assort independently. A man with straight hair and A blood has children with a woman with wavy hair and B blood. Their first child has straight hair and O blood. If their second child is a boy with straight hair, what is the probability that he has A blood? (Express your answer as a percentage. Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5.)

Both parents have AB blood. What is the probability they will have a child that also has type AB blood?Group of answer choices25%75%0%50%100%

A man who is heterozygous for type A blood has children with a woman who has type O blood. What is the probability they will have a child with type A blood?Group of answer choices0%75%25%50%100%