genetic combination 2

having freckles is a dominant trait in humans. A girl has freckles but her brother does not have freckles. What could the girls parents genotypes be for this to happen?

wet ear wax and long eye lashes are both dominant in humans. If the female has wet ear wax and long eye lashes (WwLl) and the male has dry ear wax and short eye lashes (wwll). What are the chances that the offspring will have both dominant types?

tomato plants usually have hairy stems. Hairless stems are in tomato plants that are homozygous recessive for this trait. If the stem characteristics are determined by a single gene then what is the expected outcome of crossing 2 tomato plants that are heterozygous for hairy stems?

Chickens can have different types of feathers. Frizzled feathers curl toward a chickens head. Assume that feather type is determined by a single gene and that the allele for frizzled feathers is dominant over the allele for straight feathers. In a cross between 2 chickens with straight feathers, what percent of the offspring can be expected to have frizzled feathers?

Blood type is controlled by inheritance of any 2 of the following alleles. IA codes for type A blood, IB codes for type B blood . Both IA and IB are codominant. The i allele is recessive and will cause type O blood whenever 2 copies of the allele are present. If the mother has type AB blood(IAIB) and the dad has type O blood (ii), what percent of the children are likely to have type A blood?