Genetics Review

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

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

• 1

• 2

• 3

• 4

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

AA and Aa always show up as

• dominant
• recessive

aa always shows up as

• dominant
• recessive

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

• 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

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

• tt
• Tt
• Bb
• TT

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