Simple Punnett Square

In spiders, having a hairy body is dominant to a bald body. A homozygous hairy spider is crossed with a bald spider. What are the possible phenotypes of the offspring?

• 100% hairy; 0% bald

• 50% hairy; 50% bald

• 25% hairy; 75% bald

• 75% hairy; 25% bald

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which Punnett square represents the cross of two heterozygous red flowering plants?

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Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This Punnett square shows a cross between two heterozygous parent plants.
In this species of plants, petal color is a codominant trait. Red (R) petal color is dominant, white (r) petal color is recessive, and heterozygous plants (Rr) display pink petals. What is the percentage chance that offspring plants from the two parents plants shown in the Punnett square above will produce plants with pink petals?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A homozygous dominant person is crossed with a homozygous recessive person...

• All offspring will be homozygous dominant

• All offspring will be homozygous recessive

• 50% of the offspring will be homozygous and 50% will be heterozygous

• All offspring will be heterozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Rr x Rr

• 3/4 offspring will have the dominant phenotype

• 2/4 offspring will have the recessive phenotype

• 4/4 offspring will have RR genotype

• 1/4 offspring will be heterozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

A heterozygote is crossed with a homozygous recessive...

• 100% of the offspring will be like the first parent

• 1/4 offspring will be homozygous recessive

• 50% of the offspring will have genotypes just like the parents

• none of the offspring will be like either parent

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a certain species of plant, the color purple (P) is dominant to the color white (p).

According to the Punnett Square, what is the probability of an offspring being purple?

• 25%

• 0%

• 100%

• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What genotype would go in box 2?

• BB

• Bb

• bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What are the possible phenotype(s) of the offspring? (A-Brown hair; a-blond hair)

• 50 % Brown Hair and 50% Blond Hair

• 25 % Brown Hair and 75% Blond Hair

• 75 % Brown Hair and 25% Blond Hair

• 0% Brown Hair and 100% Blond Hair

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the yellow seed genotype?

• aa

• Aa

• AA

• AA or Aa

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2