Genetics - Unit 2 Punnett Square & Pedigrees

How many alleles (letters) does a child get from each parent?

• 1

• 2

• 3

• 4

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

If B = brown fur and b = tan fur, what is the probability of brown fur?

• 25%
• 50%
• 0%
• 75%

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

What do we use pedigrees for?

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

In a pedigree, what shape represents a male?

• circle
• square
• triangle
• diamond

What does an open circle represent?

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

What does a filled in square represent?

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

How many individuals are there in the 3rd generation?

• 2
• 3
• 4
• 6