Non-Mendelian Inheritance

In the case of incomplete dominance, a cross between two heterozygous individuals yields a phenotypic and genotypic ratio of -

• 3:1

• 2:2

• 4:4

• 1:2:1

this image is an example of

• codominance

• dominance

• incomplete dominance

A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:

• all black

• all white

• all gray

• speckled black and white

In some carnations, flower color exhibits codominance. Identify the correct genotypes for red, white, and speckled carnations.

• Red = RR, white = rr, speckled = SS

• Red = RR, white = WW, speckled = SS

• Red = RR, white = RW, Speckled = WW

• Red = RR, white = WW, speckled = RW

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 roan cow shows codominance in fur color (brown and white). What is the phenotype ratio expected in offspring a female roan and a male roan mate together?

• All four would be brown and White

• Half would be orange, half would be white

• 2 Brown: 2 Brown and White: 0 White

• 1 Brown: 2 Brown and White: 1 White

Tags

NGSS.HS-LS3-1

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

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

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

Which of the following is an example of non-Mendelian inheritance?

• Incomplete dominance

• Complete dominance

• Law of segregation

• Independent assortment