Punnett Squares & Pedigrees

AA and Aa always show up as

• dominant
• recessive

Tags

NGSS.HS-LS3-1

aa always shows up as

• dominant
• recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How many boxes would say BB?

• 1
• 2
• 4
• 0

Tags

NGSS.HS-LS3-1

What allele combination should go in the missing box?

• AA
• Aa
• aa
• none of these

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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

If B = brown hair and b = blonde hair, what is the probability of brown hair?

• 25%
• 50%
• 0%
• 75%

Tags

NGSS.HS-LS3-3

What are the chances that the offspring will have homozygous recessive traits?

• 1 out of 4 , 25%

• 3 out of 4 , 75%

• 4 out of 4 , 100%

• 2 out of 4 , 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

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-LS3-3

In certain species of plants, purple flowers (P) are dominant to white flowers (p). If two heterozygous plants are crossed, what will be the phenotype of the offspring?

• 100% purple flowers
• 100% white flowers
• 75% white flowers, 25% purple flowers
• 25% white flowers, 75% purple flowers

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

What do we use pedigrees for?

• To look at families
• To make determinations about the offspring
• To track traits in families
• Nothing