In a flowering plant species, red flower color is dominant over white flower color. What is the genotype of any red-flowering plant resulting from this species?
Red and white alleles present on one chromosome
Red and white alleles present on two chromosomes
A red allele present on both homologous chromosomes
A red allele present on at least one of two homologous chromosomes
Blood type is inherited through multiple alleles. A child has type A blood and if the father has type AB blood, what are all the possible phenotypes of the mother?
phenotypes O or A
phenotypes A or AB
phenotypes A, B, AB
phenotypes O, A, B, AB
A cattle farmer genetically crosses a cow (female) with a white coat with a bull (male) with a red coat. The resulting calf (offspring) is roan, which means there are red and white hairs intermixed in the coat of the calf. The genes for coat color in cattle are co-dominant. What would result from a cross between a roan cow (female) and a roan bull (male)?
50% of offspring would be white; 50% of the offspring would be red
75% of offspring would be white; 25% of the offspring would be red
25% of offspring would be white; 50% would be red; 25% would be roan
25% of offspring would be white; 50% would be roan; 25% would be red
In four o' clock plants, the alleles for red and white flowers show incomplete dominance. When a red flowered plant is crossed with a white flowered plant all of the plants produced have pink flowers. What would result from a cross between a pink flowered plant and a red flowered plant?
100% red
50% red; 50% pink
50% red; 50% white
100% pink
In humans, normal vision (XC) is dominant to colorblindness (Xc) and is sex-linked. A normal-visioned man, whose father was colorblind, marries a colorblind woman. What are the chances that a son will be colorblind?
25%
50%
75%
100%