Grade 9 · Science
Use a simple inheritance model practice
Use stated allele rules and equally likely model outcomes without generalizing a single-gene model to every trait.
Opening your practice adventure…
Try a sample
For Aa × aa, the equally likely pairs are Aa, Aa, aa and aa. If A is dominant, what fraction shows the A-associated trait in this model?
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See the answer & why
Two of the four listed pairs contain A.
A little hint: List the possible allele pairs and use only the dominance rule given for this invented plant trait.
A teaching tip
List the possible allele pairs and use only the dominance rule given for this invented plant trait.