Punnett Squares

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%
• all tall
• TT= 75% tt = 25%
• Tt = 100%

Which of the following alleles is homozygous (purebred) recessive?

• Tt
• tt
• TT
• t

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

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

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.MS-LS3-2

What genotype would go in box 1?

• BB
• Bb
• bb

T= tall and t = short
In the Punnett square what belongs in the missing square?

• tt
• Tt
• Bb
• TT

What genotype would go in box 3?

• BB
• Bb
• bb

What genotype would go in box 2?

• BB
• Bb
• bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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

What does a Punnett Square do?

• tell you exactly what your offspring will look like
• increase the chance you pass on recessive traits
• predict genotypes and phenotypes in offspring
• have no purpose but for Taylor to give us extra assignments