Punnett Squares

If T=Tall & t=short, what is the genotypic ratio?

• 1:3
• 3:1
• 1:2:1
• 2:2

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

B - black, b - brown.  Two black mice mate and have some black and some brown mice.  What is the genotype of the parents?

• BB x Bb
• BB x bb
• Bb x Bb
• Bb x bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%

• all tall

• TT= 75% tt = 25%

• Tt = 100%

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

• BB
• Bb
• bb
• Tt

Tags

NGSS.HS-LS3-1

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?

• 25%
• 0%
• 100%
• 50%

Tags

NGSS.HS-LS3-3

What genotype would go in box 2?

• BB
• Bb
• bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following is homozygous dominant?

• Jj
• Rr
• MM
• ee

Tags

NGSS.HS-LS3-1

Heterozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

Tags

NGSS.HS-LS3-2

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive
• dominant
• lower case letter
• both 

G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• all of the choices result in yellow

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2