Exploring Non-Mendelian Genetics Concepts

What is an example of incomplete dominance in flowers?

• Japanese four o'clock flowers blending red and white to pink

• Sunflowers growing taller or shorter based on sunlight

• Pea plants showing only yellow or green seeds

• Roses only showing dominant red petals

What ratio of phenotypes is expected when crossing two pink Japanese four o'clock flowers?

• 3 pink : 1 white

• All pink

• 1 red : 3 white

• 1 red : 2 pink : 1 white

What is the expected genotypic ratio when crossing two heterozygous pink Japanese four o'clock flowers?

• 1:2:1 for red:pink:white

• 1:3 for red:white

• 3:1 for pink:white

• All offspring pink

What is an example of codominance?

• AB blood type showing both A and B antigens

• Tall and short pea plants

• Pink flowers from red and white parents

• Only red flowers in a plant

What is the chance of a child having blood type O when one parent is type A and the other is type B, assuming both are heterozygous?

• 0%

• 25%

• 50%

• 75%

What is the probability of producing a roan horse when a homozygous red horse is mated with a roan horse?

• 25%

• 0%

• 50%

• 100%

In the context of blood types, what does codominance mean?

• Both A and B antigens are fully expressed

• Only one antigen is expressed, either A or B

• No antigens are expressed

• Antigens blend to form a new type

What is the probability of a male child having hemophilia if the mother is a carrier and the father is normal?

• 75%

• 50%

• 25%

• 0%

What is the outcome for the eye color of offspring from a cross between a white-eyed female and a red-eyed male Drosophila?

• All females red-eyed and all males white-eyed

• All offspring with red eyes

• All offspring with white eyes

• 50% red-eyed and 50% white-eyed

What is the chance of a child being colorblind if the father is red-green colorblind and the mother does not carry the gene?

• 25%

• 0%

• 50%

• 100%