Karyograms and non-disjunction.

IB Biology: Karyograms and non-disjunction.

In three short activities student explore how non-disjunction can lead to changes in chromosome number. This is illustrated by reference to Down syndrome (trisomy 21). Students will watch a six minute video clip, complete a powerpoint karyotype activity and then analyse several karyotypes using a worksheet. To finish there is a review sheet containing some IB style questions.What would happen if a chromosome doesn"t...


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