Genetics & Punnet Squares

Which of the following is homozygous recessive?

• rr
• AA
• TT
• Ff

Tags

NGSS.HS-LS3-1

Which of the following is homozygous dominant?

• Jj
• Rr
• MM
• ee

Tags

NGSS.HS-LS3-1

The physical appearance of a trait is known as the-

• genotype

• phenotype

• Homozygous

• intelligence

Gretford is heterozygous. If (R) for Round head, and (r) is for Egg head, what is Gretford's genotype?

• RR

• Rr

• rr

• rR

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the probability of heterozygous offspring?

• 25%
• 50%
• 0%
• 100%

Tags

NGSS.HS-LS3-3

In plants, tall (T) is dominant to short (t).

Draw a punnett square and perform the following cross: Tt x Tt

What is the probability of producing a short plant?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-3

What allele combination should go in the missing box?

• AA
• Aa
• aa
• none of these

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A homozygous brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color).

Perform a punnett square cross and determine the phenotype & %.

• 100 % tan

• 100 % brown

• 50 % brown and 50% tan

• 75 % brown and 25 % tan

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Phenotype determines genotype

• True

• False

What genotype would go in box 2? And is it Homozygous or Heterozygous?

• BB Heterozygous

• Bb Heterozygous

• bb Homozygous

• Bb Homozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2