Codominance Lesson

Chicken feathers are inherited through codominance. When a black chicken BB is mated with a white chicken WW, the resulting phenotype is called erminette/checkered BW.   

What are the phenotypes if a checkered /erminette chicken is mated with a black feathered chicken.

• Black: 50%

  White: 0%

  Checkered: 50%

• Black: 0%

  White: 50%

  Checkered: 50%

• Black: 50%

  White: 0%

  Grey: 50%

• Black: 50%

  White: 50%

  Checkered 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Chicken feathers are inherited through codominance. When a black chicken BB is mated with a white chicken WW, the resulting phenotype is called erminette/checkered BW.   

What are the genotypes if a checkered /erminette chicken is mated with a black feathered chicken.

• BB: 50%

  WW: 0%

  BW 50%

• BB: 0%

  WW: 50%

  BW: 50%

• BB: 50%

  Bb: 0%

  bb: 50%

• BB: 50%

  WW: 50%

  BW: 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Chicken feathers are inherited through codominance. When a black chicken BB is mated with a white chicken WW, the resulting phenotype is called erminette BW.  

 

If two checkered/erminette chickens are crossed what are the chances of a checkered chicken?

• 50%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cat fur color is determined by codominance. The allele for tan fur (TT) and the allele for black fur (BB) are codominant. The heterozygous condition (TB) results in a cat with tan and black spots, called a tabby cat. 

If a tan cat was crossed with a tabby cat what are the chances of a tan cat? What are the chances of a black cat?

• 50%, 50%

• 50%, 0%

• 100%, 75%

• 25%, 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Cat fur color is determined by codominance. The allele for tan fur (TT) and the allele for black fur (BB) are codominant. The heterozygous condition (TB) results in a cat with tan and black spots, called a tabby cat. 

If a black cat was crossed with a tan cat what are the chances of a tabby cat?

• 50%

• 0%

• 100%

• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Sickle cell anemia is a trait that exhibits codominance. A person with an AA genotype does not have sickle cell anemia, and a person with an SS genotype has full sickle cell anemia. A person with an AS genotype will have some sickle-cells, though s/he might show minimal or no symptoms (a “carrier”). 

Englebert is a carrier for sickle-cell anemia (shows minimal symptoms), and his wife, Gwendoline, does not have it. What are the chances that Engelbert and Gwendoline will have a child with ANY sickle-shaped blood cells?

• 50%

• 25%

• 100%

• 75%

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

A plant shows incomplete dominance in size. A tall plant (TT) is crossed with a medium plant (TS). What fraction of plants will also be tall?

• 100 %
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-3

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

NGSS.HS-LS3-3

This type of inheritance pattern shows BOTH traits in possible offspring

• complete dominance
• incomplete dominance
• co-dominance
• dominant pattern