Monohybrid and Dihybrid Crosses

What goes in box 15

• aabb

• AABB

• aaBB

• AAbb

Tags

NGSS.MS-LS3-2

AA and Aa always show up as

• dominant

• recessive

Complete the Punnett square below.

c

b

a

BB

Bb

bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Based on the results in the monohybrid punnett, what is the percent chance of having a child with blue eyes?

• 75%

• 50%

• 25%

• 0%

Tags

112.34.c.6.F

This is a Dihybrid Punnett Square. It has 16 boxes and crosses 2 traits instead of one. Use your knowledge of how to write genotypes and fill in the first row with the correct genotypes.

a

b

c

d

GgBb

GGBB

GgBB

GGBb

Tags

112.34.c.6.F

What is the difference between a monohybrid and a dihybrid cross?

• A monohybrid cross produces a single offspring, whereas a dihybrid cross produces two offspring

• A monohybrid cross involves a single parent, whereas a dihybrid cross involves two parents

• A monohybrid cross involves only one heterozygous parent whereas a dihybrid cross involves both heterozygous and homozygous parents

• A monohybrid cross predits the outcome of one trait whereas a dihybrid cross predicts the outcome of two traits

In rabbits, black fur (B) is dominant to brown fur (b). Consider the following cross between two rabbits.
What is the phenotype of the offspring in box 3?

• Brown

• Black

• A mixture of brown and black

• None of the above

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the genotypic ratio represented by the punnett square?

• 1:1

• 3:1

• 1:3

• 1:2:1

Tags

NGSS.HS-LS4-3

The allele for having a bent pinky finger is dominant to the allele for having a straight pinky finger. If two people who are both heterozygous for the trait of a bent pinky finger have a child, what is the percent probability that the child will have straight pinky fingers?

• 0%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What is the expected genotypic ratio resulting from a heterozygous x heterozygous monohybrid cross?

• 2:1

• 3:1

• 1:2

• 1:0