Genetics and Punnett Squares

Heterozygous is when...

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

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

• tt
• Tt
• 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.HS-LS4-3

Which of the following is a phenotype?

• Aa
• black hair
• heterozygous genes
• mutated DNA

What is a dominant allele?

• A trait that is always shown (capital letter)
• A trait that can be hidden (lower case letter)
• Alleles that are the same
• Alleles that are different

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 purple?

• 25%

• 0%

• 100%

• 50%

Tags

NGSS.HS-LS3-1

What is the probability of heterozygous offspring?

• 0%

• 100%

• 50%

• 25%

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

What is the phenotype of the offspring? (A-Brown hair; a-blond hair) 

• 50 % Brown Hair and 50% Blond Hair 
• 25 % Brown Hair and 75% Blond Hair 
• 75 % Brown Hair and 25% Blond Hair 
• 0% Brown Hair and 100% Blond Hair 

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A green pea plant (GG) is being crossed with a green pea plant (Gg). What is the phenotype?

• 100 % rainbow 
• 50% yellow and 50% green 
• 100% green
• 100% yellow 

Tags

NGSS.HS-LS3-1

In sheep, short ears (L) are dominant over long ears (l). A sheep with short ears (Ll) is crossed with a sheep with long ears (ll). What is the chance of an offspring having long ears?

• 25%
• 50%
• 75%
• 100%

Tags

NGSS.HS-LS4-3