Co-dominance & Incomplete Dominance

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

• Incomplete Dominance

• Co-Dominance

• Mendelian Inheritance

• Homozygous Inheritance

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

How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?

• There is no difference

• The heterozygous genotype has a unique phenotype

• There is no heterozygous genotype

• There is only one phenotype regardless of genotype.

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

Tags

NGSS.HS-LS3-2

This type of inheritance pattern is a MIXTURE of both traits.

• incomplete dominance

• co-dominance

• complete dominance

• recessive pattern

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This type of inheritance pattern shows BOTH traits in possible offspring

• complete dominance

• incomplete dominance

• co-dominance

• dominant pattern

Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (WW)? What color are flowers that are RW?

• Red

• Red and White

• White

• Pink

Tags

NGSS.HS-LS3-1

In chickens, feather color is codominant.  If a black chicken BB is mated with one that is black and white (BW) what are the chances of having a chicken that is black and white?

• 50%

• 0%

• 25%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

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

• Red = RR, white = rr, speckled = Rr

• Red = RR, white = WW, speckled = rw

• Red = RR, white = ww, Speckled = Rw

• Red = RR, white = WW, speckled = RW

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In some carnations, flower color exhibits codominance. When crosses, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.
Complete a cross between 2 speckled flowers and find the genotype ratio.

• 0 RR: 4 RW: 0 WW

• 2 RR: 2 RW: 0 WW

• 1 RR: 2 RW: 1 WW

• 0 RR: 2 RW: 2 WW

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3