Dominance & Multiple Alleles

When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered....

• Incomplete Dominance

• Codominance

When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....

• Incomplete Dominance

• Codominance

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

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

Cross two speckled flowers.

• 1 red, 2 speckled, 1 blue

• 2 red, 2 blue

• 2 blue, 2 speckled

• 1 red, 1 speckled, 2 blue

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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

Cross a red flower with a blue flower.

• 1 red, 2 speckled, 1 blue

• 2 red, 2 blue

• 4 speckled

• 1 red, 1 speckled, 2 blue

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Radish color is completely dominant, red and white are pure breeding colors. While heterozygous are purple.

Cros a red radish with a white.

• 4 purple

• 1 red, 2 purple, 1 white

• 2 red, 2 white

• 1 red, 1 purple, 2 white

Tags

NGSS.HS-LS3-1

Radish color is completely dominant, red and white are pure breeding colors. While heterozygous are purple.

Cros a red radish with a purple.

• 4 purple

• 1 red, 2 purple, 1 white

• 2 red, 2 purple

• 1 red, 1 purple, 2 white

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Radish color is completely dominant, red and white are pure breeding colors. While heterozygous are purple.

Cros a white radish with a purple.

• 4 purple

• 1 red, 2 purple, 1 white

• 2 purple, 2 white

• 1 red, 1 purple, 2 white

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In cattle red coats are represented as RR, and white coats are represented as WW.

What is the genotype for Roan color?

• RR

• RW

• WW

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This is an example of ___________.

•  Incomplete Dominance
•  Codominance

Tags

NGSS.HS-LS3-2