Monohybrid and Dihybrid Crosses

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

• 75%

• 50%

• 25%

• 0%

Tags

NGSS.MS-LS3-2

Based on the results in the monohybrid punnett square, what is the genotypic ratio?

• 1:2:1

• 0:2:2

• 0:0:4

• none

Tags

NGSS.HS-LS3-3

What is the term for a cross that involves just one trait, such as pod shape?

• test cross

• dihybrid cross

• monohybrid cross

• homozygous cross

What are the possible genotypes for this cross?

• TT=25%, Tt=50%, tt=25%

• all tall

• TT=75%, tt=25%

• Tt=100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What are the phenotype percentages of the offspring?

• 50 % Brown fur and 50% White fur

• 25 % Brown fur and 75% White fur

• 75 % Brown fur and 25% White fur

• 0% Brown fur and 100% White fur

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the phenotypic ratio for the monohybrid cross between blue and brown eyes?

• 3:1

• 2:2

• 0:2:1

• 1:2:1

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In Jessica's family gene pool, brown eyes are dominant, and blue eyes are recessive. Jessica is heterozygous for brown eyes and her husband is heterozygous for brown eyes. Complete the Punnett to show the possible genotypes for their baby.

e

f

g

d

c

a

b

b (top)

Bb

bb

B (top)

BB

B (side)

b (side)

Tags

112.34.c.6.F

Which of the following genotypes would be considered homozygous recessive?

• RR

• Bb

• dd

• g

Which of the following would produce a recessive phenotype?

• hh

• Rr

• Ww

• BB

If your genotype is Bb, then you can only pass a B or b separately to your child but you can't pass both. This is known as the ________.

• Law of Dominance

• Law of Segregation

• Law of Independent Assortment