Practice Dihybrid Crosses and Monohybrid Crosses

What genotype is missing from this Punnett Square?

• RrYy
• RRYY
• rryy
• RrYY

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?

• 9/16

• 3/16

• 1/16

• 16/16

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?

• 12.5%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3

What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?

• Ry
• RRyy
• RrYy
• Rryy

What fraction of offspring from the cross AaBB x Aabb will be heterozygous for both traits?

• 1/16
• 1/4
• 1/2
• 3/16

Tags

NGSS.HS-LS3-3

Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r  = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds? 

• 0%
• 25%
• 50%
• 100%

In a dihybrid cross

• one trait is crossed.
• two traits are crossed.
• four boxes are needed for the punnett square.
• mom's alleles are dominant.

In flowers, purple color is dominant to pink and short is dominant to tall. Cross a flower that is heterozygous for both traits with another flower that is pink and tall. What is the percentage of the flowers being pink and short?

• 75%
• 25%
• 4
• 1/2

parent 1: GgBB
parent 2: ggBb
Find the gametes for parent 1.

• GB, GB, gB, gB
• gB, gb, gB, gb
• Gg, BB, GB, GB
• gg, Bb, gB, gb

Tags

NGSS.HS-LS3-2

Which of the following identifies the gametes?

• A
• B
• C
• D

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2