Practice Monohybrid Crosses

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt

• Tt

• Bb

• TT

Tags

NGSS.HS-LS3-2

Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?

• 100% Pp (purple)

• 50% Pp (purple); 50% pp (white)

• 75% Pp (purple); 25% pp (white)

• 25% PP, 50% Pp, 25% pp
  75% purple, 25% white

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Which is heterozygous ?

• Tt

• TT

Which of the following is a genotype?

• long hair

• blue eyes

• Gg

• tall

Tags

NGSS.HS-LS3-2

Based on the genotypes present in this Monohybrid Punnett square, which eye color is dominant?

• brown

• blue

Tags

NGSS.HS-LS3-1

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.HS-LS3-1

NGSS.HS-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

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

In cacti, long arms (A) are dominant to short arms (a). Suppose 2 heterozygous cacti are crossed. What percentage of their offspring are expected to have short arms?

• 0%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2