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Junior Activity Week 
Genetic Problems
The best way to make sure you can understand genetics is to practise problems.  In level 2 you are required to know about Monohybrid problems with Incomplete dominance, co dominance and lethal genes. Sex linked gene problems will be assessed also.
Dihyrid problems involve two characteristics on the same gene and test crosses or back crosses could involve monohybrid or Dihybrid problems. Linked genes are assessed by asking you to draw a chromosome map and crossing over values could be asked.
Dihybrid problems require you to be able to work out the possible gametes.  Remember you need one of each gene.
The ratio for a heterozygous Dihybrid cross is always the same and needs to be learned and understood. ( 9:3:3:1)
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Genetic problems
Practise genetic problems