Punnett Square

Homozygous is when...

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

Which of the following is a Homozygous Dominant Genotype?

• Yy

• XX

• zz

Which of the following is a homozygous recessive genotype?

• HH

• dd

• Aa

Which of the following is a heterozygous genotype?

• Gg

• UU

• pp

Fill in the Yellow Box

• AA

• Aa

• aa

Fill in the Yellow Box

• Bb

• BB

• bb

What are the possible phenotype(s) of the offspring? (A-Brown hair; a-blond hair)

• 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

In a certain species of plant, the color purple (P) is dominant to the color white (p).

According to the Punnett Square, what is the probability of an offspring being purple?

• 25%

• 0%

• 100%

• 50%