6. Multiple Genes Interact To Determine The Phenotype.

Question: Multiple genes interact to determine the phenotype.

Answer: Polygenic traits

Question: Two alleles are dominant, resulting in offspring that show both phenotypes.

Answer: Co-dominance

Question: One gene has several different forms, resulting in more than two phenotypes.

Answer: multiple alleles

Question: Two alleles are neither completely dominant nor completely recessive, resulting in a phenotype that is a combination of the two

Answer: incomplete dominance

Question: Cytokinesis is the division of the ________________.

Answer: cell/cytoplasm

Question: Identify all of the possible allele combinations in the gametes formed by a plant that is heterozygous for seed shape and seed color (RrYy).

Answer: rY & RY

Question: A gene that is expressed only in the homozygous condition.

Answer: recessive

Question:

Answer: -An approximately three-to-one ratio of black to brown coated mice in F2 is accounted for by the black allele being dominant over the brown allele.

-The F1 male produced two kinds of sperm, half carrying an allele for black coat color, and half carrying an allele for brown coat color.

Question: In rabbits, the brown (agouti) coat color is dominant and black coat color is recessive.

Which of the following includes all of the possible genotypes for brown rabbits.

Answer: AA, Aa

Question: What is the expected phenotypic ratio in a cross between 2 pink flowered plants when the trait shows intermediate inheritance?

Answer: 1:2:1