5.3 Punnett Squares and Pedigrees

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• DNA

Dominant alleles are represented by a:

• Male gene
• lowercase letter
• recessive trait
• capital letter

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

• 25%
• 50%
• 0%
• 75%

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

Draw a punnett square. Black hair color (H) is dominant to white hair color (h) in mice. Determine the phenotypic ratio for the offpring of a heterozygous black mouse and a white mouse.

• 4 Black: 0 White

• 3 Black: 1 White

• 2 Black: 2 White

• 0 Black: 4 White

Tags

NGSS.HS-LS3-3

Draw a punnett square. 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-LS3-2

How many individuals are there in the 3rd generation?

• 2
• 3
• 4
• 6

Tags

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

How are individuals III-2 and II-4 related?

• Cousins
• Dad and Daughter
• Uncle and Niece
• Grandpa and Granddaughter

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What does a filled in square represent?

• Not affected Female
• Not affected Male
• Affected Male
• Affected Female

What does an open circle represent?

• Not Affected Male
• Not Affected Female
• Affected Male
• Affected Female