Incomplete and Codominance Practice

What type of inheritance do two alleles have if their traits blend together? 

• Incomplete Dominance

• Co-Dominance

• Mendelian Inheritance

• Homozygous Inheritance

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).

Cross a red flower with a speckled flower. What is the phenotypic ratio?

• 2 red, 2 speckled

• 2 red, 2 blue

• 2 blue, 2 speckled

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?

• 4: Orange and White

• 1: Orange : 1 White

• 2 Orange: 2 Orange and White: 0 White

• 1: Orange: 2 Orange and White: 1 White

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

• Incomplete Dominance

• Co dominance

• Independent assortment

• Recessive inheritance

Tags

NGSS.HS-LS3-2

What do you call the non-Mendelian inheritance pattern that states that neither trait is dominant and the traits appear to blend together?

• Codominance

• Incomplete dominance

• Polygenic traits

In roses, petal color can be white, red, or pink. What would be the expected genotypes and phenotypes if a red rose was crossed with a pink rose? What type of inheritance pattern is this?

• incomplete dominance; 2RR: 2PP: 0WW

• codominance; 2RR: 2PP: 0WW

• incomplete dominance; 2RR: 2RW: 0WW

• codominance; 2RR: 2RW: 0WW

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In horses, coat color can be brown, white or brown with white spots. What would be the expected genotypes and phenotypes if a white horse mated with a brown with white spots horse? What type of inheritance pattern is this?

• incomplete dominance; 0BB: 2BW: 2WW

• codominance; 0BB: 2BW: 2WW

• incomplete dominance; 1BB: 2BW: 1WW

• codominance; 1BB: 2BW: 1WW

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following statements is true regarding blood types?

• A and O are codominant, B is recessive.

• B and O are codominant, A is recessive.

• A and B are codominant, O is recessive.

• A , B and O are all codominant with each other.

A man with type A blood and a woman with type B blood have 4 kids. Each child has a different blood type. What are the most likely genotypes of the man and woman?

• Man: IAIA

  Woman: IBIB

• Man: IAi

  Woman: ii

• Man: ii

  Woman: IBi

• Man: IAi

  Woman: IBi

Tags

NGSS.HS-LS3-1