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Punnett SquarePercentage Practice
1. Complete all squares and percentages.- Work slowly and carefully.- Little mistakes add up!
2. Check your answers as you go, and find your mistakes before moving on.
PunnettPercentagePractice (#1)
___ ___
AA =Aa = aa =
OffspringPhenotype Chance (%)Dominant Trait =
Recessive Trait =
OffspringGenotype Chance (%)
___
___
Parent 1 Genotype: AA Parent 2 Genotype: aa
PunnettPercentagePractice (#1)
Aa Aa
Aa Aa
_A_ _A_
AA = 0Aa = 100aa = 0
OffspringPhenotype Chance (%)Dominant Trait =
100
Recessive Trait = 0
OffspringGenotype Chance (%)
_a_
_a_
Parent 1 Genotype: AA Parent 2 Genotype: aa
PunnettPercentagePractice (#2)
___ ___
AA =Aa = aa =
OffspringPhenotype Chance (%)Dominant Trait =
Recessive Trait =
OffspringGenotype Chance (%)
___
___
Parent 1 Genotype: AA Parent 2 Genotype: Aa
PunnettPercentagePractice (#2)
AA AA
Aa Aa
_A_ _A_
AA = 50Aa = 50aa = 0
OffspringPhenotype Chance (%)Dominant Trait =
100
Recessive Trait = 0
OffspringGenotype Chance (%)
_A_
_a_
Parent 1 Genotype: AA Parent 2 Genotype: Aa
PunnettPercentagePractice (#3)
___ ___
AA =Aa = aa =
OffspringPhenotype Chance (%)Dominant Trait =
Recessive Trait =
OffspringGenotype Chance (%)
___
___
Parent 1 Genotype: Aa Parent 2 Genotype: Aa
PunnettPercentagePractice (#3)
AA Aa
Aa aa
_A_ _a_
AA = 25Aa = 50aa = 25
OffspringPhenotype Chance (%)Dominant Trait =
75
Recessive Trait = 25
OffspringGenotype Chance (%)
_A_
_a_
Parent 1 Genotype: Aa Parent 2 Genotype: Aa
PunnettPercentagePractice (#4)
___ ___
AA =Aa = aa =
OffspringPhenotype Chance (%)Dominant Trait =
Recessive Trait =
OffspringGenotype Chance (%)
___
___
Parent 1 Genotype: Aa Parent 2 Genotype: aa
PunnettPercentagePractice (#4)
Aa aa
Aa aa
_A_ _a_
AA = 0Aa = 50aa = 50
OffspringPhenotype Chance (%)Dominant Trait =
50
Recessive Trait = 50
OffspringGenotype Chance (%)
_a_
_a_
Parent 1 Genotype: Aa Parent 2 Genotype: aa
PunnettPercentagePractice (#5)
___ ___
AA =Aa = aa =
OffspringPhenotype Chance (%)Dominant Trait =
Recessive Trait =
OffspringGenotype Chance (%)
___
___
Parent 1 Genotype: AA Parent 2 Genotype: AA
PunnettPercentagePractice (#5)
AA AA
AA AA
_A_ _A_
AA = 100Aa = 0aa = 0
OffspringPhenotype Chance (%)Dominant Trait =
100
Recessive Trait = 0
OffspringGenotype Chance (%)
_A_
_A_
Parent 1 Genotype: AA Parent 2 Genotype: AA
PunnettPercentagePractice (#6)
___ ___
AA =Aa = aa =
OffspringPhenotype Chance (%)Dominant Trait =
Recessive Trait =
OffspringGenotype Chance (%)
___
___
Parent 1 Genotype: aa Parent 2 Genotype: aa
PunnettPercentagePractice (#6)
aa aa
aa aa
_a_ _a_
AA = 0Aa = 0aa = 100
OffspringPhenotype Chance (%)Dominant Trait =
0
Recessive Trait = 100
OffspringGenotype Chance (%)
_a_
_a_
Parent 1 Genotype: aa Parent 2 Genotype: aa
