Di-Hybrid Crosses.

IB Biology: Di-Hybrid Crosses.

This lesson gives students a guided tour of dihybrid genetic crosses using Punnett squares predicting the combination of alleles from two unlinked genes at the same time. The method described provides a good foundation for the more complex examples which come later. A quick animated introduction is followed by some di-hybrid genetics problems. An extension task for faster students provides a selection of dihybrid problems...

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