Punnett Squares

Choose the combination(s) that would show a dominant phenotype.

• Rr

• RR

• rr

This means Different Gene

• Dominant
• Recessive
• Homozygous
• Heterozygous

Tags

NGSS.HS-LS3-2

What ratio of the offspring from the cross shown will be homozygous recessive for the  trait of tallness? 

• 0 in 4
• 1 in 4
• 2 in 4
• 4 in 4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

How many individuals are there in the 3rd generation?

• 2
• 3
• 4
• 6

Tags

NGSS.HS-LS3-1

What is the genotypic ratio here?

• 25% blue eye 75 % brown eye 
• BB = 25% Bb = 50% bb = 25%
• BB= 50 % bb = 50%
• All brown eye

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In the Punnett square shown, what must the genotype of the missing parent be?

• BB
• Bb
• bb
• Tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?

• 8
• 5
• 2
• 3

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How many of the males in this pedigree show the trait being studied?

• 2
• 3
• 4
• 6

Tags

NGSS.HS-LS3-1

B = brown fur  b = white fur
In the Punnett square, what is the probability for white fur? 

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Gregor Mendel is often called ....

• The father of heredity.
• The father of genetics.
• The king of peas
• The father of punnett squares.

Tags

NGSS.HS-LS3-1