HW: Punnett Squares

In flies, red eyes (R) are dominant to brown eyes (r). A heterozygote fly is crossed with a homozygous recessive fly. What percentage of offspring will have brown eyes?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In flies, red eyes (R) are dominant to brown eyes (r). A heterozygote fly is crossed with a homozygous recessive fly. What fraction of offpsring will be heterozygotes?

• 1/4

• 1/2

• 2/4

• 3/4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In a plant species, long stems (L) are dominant to short stems (l). A heterozygous plant is crossed with a homozygous dominant plant. What percentage of offspring will have short stems?

• 25%

• 50%

• 75%

• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a plant species, long stems (L) are dominant to short stems (l). A heterozygous plant is crossed with a homozygous dominant plant. What will be the ratio of genotypes in the offspring?

• 1:1

• 2:2

• 1:3

• 0:4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

In a species of mammals, gray fur (G) is dominant to white fur (g). Two heterozygous mammals are mated together and produce offspring. What fraction of offspring will have gray fur?

• 1/4

• 1/2

• 3/4

• 2/4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In a species of mammals, gray fur (G) is dominant to white fur (g). Two heterozygous mammals are mated together and produce offspring. What percentage of the offspring will have white fur?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In plants, being short (t) is recessive to the tall allele (T).

A heterozygous plant is crossed with a short plant. What will be the ratio of tall plants to short plants?

• 1:1

• 2:2

• 1:3

• 3:1

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In plants, being short (t) is recessive to the tall allele (T).

A heterozygous plant is crossed with a short plant. What fraction of offspring will be homozygous recessive?

• 1/4

• 2/4

• 1/2

• 3/4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a certain animal, brown eyes are dominant and blue eyes are recessive. A heterozygote is mated with a blue eyed animal. What fraction of offspring will have blue eyes?

• 1/4

• 2/4

• 1/2

• 4/4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In a certain animal, brown eyes are dominant and blue eyes are recessive. A heterozygote is mated with a blue eyed animal. What percentage of the offspring will be heterozygotes?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3