Punnett Square

Dominant or recessive?
tt

• Dominant 
• Recessive

Dominant or recessive?
Dd

• Dominant
• recessive
• neither
• homozygous

Emily has brown hair. Which is most likely a true statement about Emily?

• Emily’s favorite color is brown.
• Emily has a parent with brown hair.
• Emily’s older brother has brown hair. 

What are the possible combinations of a pea plant with the alleles PP and a male pea plant with the alleles pp.
P= purple
p= white

• all Pp
• all PP
• Pp,PP,Pp,PP
• all pp

Homozygous is when...

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

B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 

• 0%
• 25%
• 50%
• 75%

Homozygous or heterozygous?
BB

• Homozygous
• Heterozygous

Which of these Punnett squares represents a cross between a homozygous dominant parent and a heterozygous parent?

• 
• 
• 
• 

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

• tt
• Tt
• Bb
• TT

What is the probability of heterozygous offspring?

• 25%
• 50%
• 0%
• 100%