Incomplete Dominance

In some chickens, feather color shows incomplete dominance. If a black chicken BB is mated with one that is blue (BW), what is the probability of having a chicken that is black?

• 1/4

• 1/2

• 3/4

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In snapdragons, flower color exhibits incomplete dominance. When crossed, red (RR) and white (WW) flowers make pink flowers (RW). Complete a cross between a pink flower and a red flower. Find the phenotype ratio.

• 1 red: 1 pink

• 4 red: 0 pink

• 4 pink: 0 white

• 1 pink: 1 white

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In humans, there are three phenotypes for hair--curly, wavy, and straight. Hair texture shows incomplete dominance. Suppose two people with wavy hair have a child. What is the probability the child will have straight hair?

• 100%

• 0%

• 25%

• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A purple-flowered plant (PP) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have blue (PW) flowers?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Raccoons can exhibit three types of washing behaviors controlled by a gene that shows incomplete dominance. Some raccoons wash all of their food (WW) and some wash none of their food (NN). The heterozygotes wash some of their food. Two heterozygous raccoons mate. What percentage of their offspring are expected to wash some of their food?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3