Science · Grades 8–11
Genetics: models and probability · revision card
These questions assume one gene with alleles A and a, complete dominance, and equally likely allele transmission.
Keep these ideas clear
State the model
These questions assume one gene with alleles A and a, complete dominance, and equally likely allele transmission.
Do not overinterpret
Dominant does not mean common, stronger, better or certain in an individual child.
Two useful examples
In the stated model, which genotype is heterozygous?
Aa
Aa
Which genotype is homozygous recessive?
aa
aa
Explain it without looking
- Which process normally reduces chromosome-set number in the formation of gametes in animals?
Further reading and review references
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.