Punnett Squares

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

AA and Aa always show up as

• dominant
• recessive

Which of the following genotypes is homozygous dominant?

• A
• Aa
• AA
• aa

What ratio of the offspring from the cross shown will be homozygous recessive for the  trait of tallness? 

• 0 in 4
• 1 in 4
• 2 in 4
• 4 in 4

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

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

• tt
• Tt
• Bb
• TT

aa always shows up as

• dominant
• recessive

Aa is

• homozygous
• heterozygous

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• DNA