Basic Genetics Check-Up

Rainbow horns are dominant to yellow horns in unicorns. If a homozygous dominant unicorn mates with a yellow horned unicorn, what percent of the baby unicorns will have rainbow horns?

• 100%
• 50%
• 25%
• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Freckles are (effectively) a dominant trait. A man with freckles has a child with a woman who also has freckles.
However, the kid does not have freckles. What is a reasonable conclusion?

• It's not his kid
• Both parents are heterozygous for freckles
• The mother must be homozygous recessive for freckles
• There's a monosomy of the freckle chromosome

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two pea plants are crossed. One is homozygous tall and the other is homozygous short. The genotypes of the offspring will be:

• homozygous dominant

• homozygous recessive

• heterozygous

Tags

NGSS.HS-LS3-2

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

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-LS3-3

If two parents are heterozygous for type A blood, what is the probability that their offspring would have type O blood?

• 100 %
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-3

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-LS3-2

having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• protein
• chromosome

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

having two different genes for a trait (sometimes called hybrid).

• protein
• homozygous
• heterozygous
• genotype

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2