non mendelian genetics

What is the phenotypic ratio when crossing a red flower (RR) with a speckled flower (RB) in a codominance scenario?

• 1 red, 3 speckled

• 2 red, 2 speckled

• 3 red, 1 speckled

• 4 red, 0 speckled

In snapdragons, if a red flower (RR) is crossed with a white flower (rr), what color are the flowers that are Rr?

• Red

• White

• Pink

• Yellow

Give an example of a trait that exhibits multiple alleles.

• Blood type in humans (A, B, AB, O)

• Eye color in humans

• Height in plants

• Skin color in humans

How can environmental factors influence the expression of a trait?

• By altering the genotype directly

• By interacting with the genotype to affect the phenotype

• By having no effect on the phenotype

• By changing the genetic code permanently

If a red flowered plant (RR) breeds with a white flowered plant (WW) and the gene for petal color expresses incomplete dominance, what percentage of the offspring will have pink (RW) flowers?

• 50%

• 75%

• 100%

• 25%

What is the role of alleles in genetics?

• Alleles are identical forms of a gene that do not contribute to genetic variation.

• Alleles are different forms of a gene that can exist at a specific locus on a chromosome, contributing to the genetic variation in traits.

• Alleles are proteins that determine the physical characteristics of an organism.

• Alleles are segments of DNA that are not involved in heredity.

What is the expected phenotypic ratio of a monohybrid cross involving codominant traits?

• 1:1 ratio for two phenotypes.

• 3:1 ratio for two phenotypes.

• 1:2:1 ratio for the three phenotypes.

• 2:1 ratio for three phenotypes.

What is the expected genotype ratio from a cross between two heterozygous individuals (Aa x Aa)?

• 1 AA : 2 Aa : 1 aa

• 1 AA : 1 Aa : 1 aa

• 3 Aa : 1 aa

• 2 AA : 1 Aa : 2 aa

What is the term for a gene that is controlled by more than two alleles?

• Multiple Alleles

• Polygenic Inheritance

• Codominance

• Incomplete Dominance

What is the pattern of heredity in which both alleles are simultaneously expressed in the heterozygote?

• Codominance

• Incomplete dominance

• Complete dominance

• Polygenic inheritance