The document discusses Punnett squares and basic genetics concepts. It defines key terms like heterozygous, homozygous, genotype and phenotype. It provides examples of Punnett squares and asks the reader to determine genotypes and phenotypes based on whether a trait is dominant or recessive. It also includes an example involving the inheritance of face color and hair color in Oompa Loompas.

1. Punnett Square Challenges!
Can you beat Mr. Forde?

2. • Heterozygous means mixed alleles..... like "Tt" or "Ss”
• Homozygous means same alleles.... "TT" or "ss”
There are two kinds of Homozygous......
– If you have two large letters you are Homozygous Dominant "TT"
etc.
– If you have two small letter alleles you are Homozygous Recessive
"tt" etc.
– -------------------------------------------------------------------------------------------------
• Genotype means your genetic make up like TT or Tt. You are
talking about the alleles or genes.
• Phenotype is the actual outcome of the gene. "Tongue
roller" or "Blue Eyes". It is what you see expressed.
Let’s Review important vocabulary……

3. Heterozygous or Homozygous??
Tt
TT
bb Bb
BB tt
- Heterozygous
(Hybrid)
- Heterozygous
(Hybrid)
- Homozygous
Dominant
- Homozygous
Dominant
- Homozygous
Recessive
- Homozygous
Recessive

4. What are the Phenotypes?
1) Purple Flowers are DOMINANT to white
flowers.
PP- Purple
Pp-
Whitepp-
Purple

5. What are the Phenotypes?
2) Round Seeds are DOMINANT to wrinkled
seeds.
RR- Round
Rr-
Wrinkledrr-
Round

6. What are the Phenotypes?
3) Brown Eyes are DOMINANT to blue
eyes.
BB- Brown
Bb-
Bluebb-
Brown

7. What are the Phenotypes?
4) Bob (short) Tails are RECESSIVE to long tails.
TT- Long
Tt-
Bob (Short)tt-
Long

8. What are the Genotypes?
A) Straight hair is dominant to curly.
SS- Straight
Ss-
Curlyss-
Straight

9. What are the Genotypes?
B) Pointed heads are dominant to round
heads.
PP- Pointed
Pp-
roundpp-
Pointed

10. Rr x rr – Round is dominant
• What percentage will be round?
R r
r
r
R
R
r
r
r
r
r
r

11. Rr x Rr – Round is dominant
• What percentage will be round?
R r
R
r
R
R
r
r
R
r
R
r

12. RR x Rr – Round is dominant
• What percentage will be round?
R r
R
R
R
R
r
r
R
R
R
R

14. Oompah Loompah Genetics
• Blue Face is dominant.
• Orange Face is recessive.
BB-
Bb-
bb-
BLUE
BLUE
ORANGE

15. Oompah Loompah Genetics
• Blue Face is dominant.
• Orange Face is recessive.

17. Oompah Loompah Genetics
• Blue Face is dominant.
• Orange Face is recessive.

19. Oompah Loompah Genetics
• Blue Face is dominant.
• Orange Face is recessive.

21. Oompah Loompah Genetics
• Blue Face is dominant.
• Orange Face is recessive.

23. Oompah Loompah Genetics
• Blue Face is dominant.
• Orange Face is recessive.

25. Oompah Loompah Genetics
RR-
BB-
RB-
Red
BLUE
Purple

26. Oompah Loompah Genetics
• RED HAIR is RR.
• Blue Hair is BB.
• Purple Hair is RB

28. Oompah Loompah Genetics
• RED HAIR is RR.
• Blue Hair is BB.
• Purple Hair is RB