Punnett Square

Which of the following is a phenotype?

• Aa
• black hair
• heterozygous genes
• mutated DNA

Dominant or recessive?
tt

• Dominant 
• Recessive

Which of the following genotypes is heterozygous?

• Bb
• BB
• bb
• B

In the punnett square shown, what must the genotype of the missing parent be?

• BB
• Bb
• bb
• Tt

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

• tt
• Tt
• Bb
• TT

Homozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

What allele combination should go in the missing box?

• AA
• Aa
• aa
• none of these

B = brown fur b = white fur

In the punnett square, what is the probability for white fur?

• 0%

• 25%

• 50%

• 75%

Two brown eyed parents (Bb) have a baby. What is the chance their baby is blue eyed?

• 0 %

• 25%

• 50%

• 75%

Brown eyes are dominant over blue eyes. What is the probability that the offspring will have brown eyes in this cross?

• 25%

• 50%

• 75%

• 100%