Punnett Square Challenges!

Can you beat Mr. Forde?

• 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.

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• 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……

Heterozygous or Homozygous??

TtTT

bb Bb

BB tt

- Heterozygous (Hybrid)

- Heterozygous(Hybrid)

- HomozygousDominant

- HomozygousDominant

- HomozygousRecessive

- HomozygousRecessive

What are the Phenotypes?

1) Purple Flowers are DOMINANT to white

flowers.

PP- Purple

Pp-

Whitepp-

Purple

What are the Phenotypes?

2) Round Seeds are DOMINANT to wrinkled

seeds.

RR- Round

Rr-

Wrinkledrr-

Round

What are the Phenotypes?

3) Brown Eyes are DOMINANT to blue

eyes.

BB- Brown

Bb-

Bluebb-

Brown

What are the Phenotypes?

4) Bob (short) Tails are RECESSIVE to long tails.

TT- Long

Tt-

Bob (Short)tt-

Long

What are the Genotypes?

A) Straight hair is dominant to curly.

SS- Straight

Ss-

Curlyss-

Straight

What are the Genotypes?

B) Pointed heads are dominant to round

heads.

PP- Pointed

Pp-

roundpp-

Pointed

Rr x rr – Round is dominant• What percentage will be round?

R r

r

r

R

R

r

r

r

r

r

r

Rr x Rr – Round is dominant• What percentage will be round?

R r

R

r

R

R

r

r

R

r

R

r

RR x Rr – Round is dominant• What percentage will be round?

R r

R

R

R

R

r

r

R

R

R

R

Oompah Loompah Genetics• Blue Face is dominant.

• Orange Face is recessive.

BB-

Bb-

bb-

BLUE

BLUE

ORANGE

Oompah Loompah Genetics• Blue Face is dominant.

• Orange Face is recessive.

Oompah Loompah Genetics• Blue Face is dominant.

• Orange Face is recessive.

Oompah Loompah Genetics• Blue Face is dominant.

• Orange Face is recessive.

Oompah Loompah Genetics• Blue Face is dominant.

• Orange Face is recessive.

Oompah Loompah Genetics• Blue Face is dominant.

• Orange Face is recessive.

Oompah Loompah Genetics

RR-

BB-

RB-

Red

BLUE

Purple

Oompah Loompah Genetics• RED HAIR is RR.

• Blue Hair is BB.

• Purple Hair is RB

Oompah Loompah Genetics• RED HAIR is RR.

• Blue Hair is BB.

• Purple Hair is RB