 “Stronger” trait  Will show as long as gene is present  Represented by capital letter (B)

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Presentation transcript:

 “Stronger” trait  Will show as long as gene is present  Represented by capital letter (B)

 “Weaker” trait  Needs to have 2 to show up  Represented by lowercase letter (b)

 What YOU look like  Example: roller, non-roller, red hair, non-red hair

 What the genes look like (letters of genes)  Example: Rr, RR, rr

 2 of the same alleles (genes)  Example: RR, rr

 1 of the same alleles (genes)  Example: Rr

13 Homozygous Dominant = TT

(Homozygous) Recessive = tt Heterozygous= Tt

 Likelihood that an event will happen  Used to predict in genetics

ALBINO ANIMALS!

Animals with no pigment Lack of color in eyes allows to see through to blood vessel = red eyes

Some “normal” animals carry the albinism gene (a) Must have 2 recessive genes for albinism (aa)

Now it’s time for PUNNET SQUARES!

 Chart used to show possible gene combinations

Glue in the small piece of paper you were given in the remaining space!

Normal Squirrel Albino Squirrel Phenotype: Normal Genotype: AA or Aa Phenotype: Albino Genotype: aa x

AA a a AaAa AAaa Chances: 100% not albino 0 % albino

Aa a a Aaaa Aaaa Chances: 50% not albino 50 % albino

Aa A a AAAa Aaaa Chances: 75% not albino 25% albino

Heterozygous Tongue Roller Phenotype: Roller Genotype: Tt Heterozygous Tongue Roller Phenotype: Roller Genotype: Tt

Homozygous Tongue Roller Phenotype: Roller Genotype: TT Homozygous Tongue Roller Phenotype: Roller Genotype: TT