1. Notes: Punnett squares (pg 8)

2. Notes: Punnett squares (pg 8)
• Punnett square = Diagram used to predict the
possible offspring of a cross

3. Notes: Punnett squares (pg 8)
• Punnett square = Diagram used to predict the
possible offspring of a cross
• Created by Reginald Punnett

4. Notes: Punnett squares (pg 8)
• Punnett square = Diagram used to predict the
possible offspring of a cross
• Created by Reginald Punnett
• The alleles of one parent are written across
the top of the square (one allele per box) and
those of the other parent are written on the
side

6. • Genotype frequency: 25% BB, 50% Bb, 25% bb

7. • Genotype frequency: 25% BB, 50% Bb, 25% bb
• Phenotype frequency: 75% Black, 25% White

8. Output (pg 9)
• Guinea pig diagram
• Tape as close to the top as you can

9. Example Problem (pg 8)
• In guinea pigs, black fur (B) is dominant to white
fur (b). A heterozygous black female mates with a
white male. What are the genotype and
phenotype ratios of the offspring?

10. Output (pg 9)
• Make up a problem that requires a Punnett
square to solve it. Write it on pg 9. Then trade
interactive notes with your neighbor and have
them try to solve it