Heredity

Which is an example of a homozygous recessive trait?

• BB

• Bb

• bb

Which is an example of a homozygous dominant trait?

• TT

• Tt

• tt

Which is an example of a heterozygous trait?

• DD

• Dd

• dd

What is genotype?

• Two alleles that form a gene pair (one from the father, one from the mother) for a particular trait (eye color, hair color, height).

• The trait that shows.

• Bb

• Brown eyes

Tags

NGSS.HS-LS3-1

What is phenotype?

• Two alleles that form a gene pair (one from the father, one from the mother) for a particular trait (eye color, hair color, height).

• The trait that shows.

• Tt

What percentage of the offspring will have homozygous dominant eyes?

• 25%

• 50%

• 75%

• 100%

• None

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

What percentage of the offspring will have heterozygous brown eyes?

• 25%

• 50%

• 75%

• 100%

• None

What percentage of the offspring will have homozygous recessive eyes?

• 25%

• 50%

• 75%

• 100%

• None

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Why do the offspring with the genotype Bb have brown eyes, not blue eyes?

• Because brown eyes is a recessive trait.

• Because blue eyes is a recessive trait.

• Because brown eyes is a dominant trait and masks the recessive trait.

• Because brown eyes is a recessive trait and masks the dominant trait.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

R = Red eyes

r = white eyes

What percentatge of the offspring will have red eyes?

• 25%

• 50%

• 75%

• 100%

• None

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2