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Mendelian Genetics
AP Biology · Unit 5: Heredity
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Monohybrid
Dihybrid
Testcross
Incomplete Dom.
Parent 1 Genotype
Allele A locus
A
a
A
a
Allele B locus
B
b
B
b
Parent 2 Genotype
Allele A locus
A
a
A
a
Allele B locus
B
b
B
b
Simulate offspring (n=100)
🎲 Simulate 100 Offspring
📝 Quick Quiz
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1. In a cross Aa × Aa, the probability of getting aa offspring is:
1/4
1/2
3/4
0
2. A dihybrid cross AaBb × AaBb gives a phenotypic ratio of:
3:1
1:2:1
9:3:3:1
1:1:1:1
3. Which cross is used to determine if an organism is homozygous dominant or heterozygous?
F1 × F1 cross
Testcross (× recessive)
Dihybrid cross
Incomplete dominance cross
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