Punnett Square Vocabulary and Analysis

Dominant alleles are represented by a:

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

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

How many alleles (letters) does each person carry for a trait?

• 1

• 2

• 3

• 4

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive
• dominant
• lower case letter
• both 

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• DNA

Which of the following is homozygous dominant?

• Yy
• Y
• yy
• YY

Which of the following is homozygous recessive?

• Tt
• tt
• TT
• T

A-Brown hair; a-blond hair

Which describes is the phenotypes of the offspring?

• 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

What is the probability of heterozygous offspring?

• 25%
• 50%
• 0%
• 100%