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→Key Stage 4
===About Sickle Cell Anemia===
: The [[Red Blood Cell|red blood cells]] are sickle shaped in [[Sickle Cell Anemia]] which causes them to become stuck in [[capillaries]].
: '''Sickle Cell Anemia''' is caused by a [[Recessive Allele|recessive allele]] and can be passed from parent to [[offspring]].
{| class="wikitable"
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|[[File:PunnettSquareSickle.png|center|400px]]
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| style="height:20px; width:200px; text-align:center;" |This In this [[Punnett Square]] the [[Sickle Cell Anemia]] [[Recessive Allele|recessive allele]] is represented with a lower case 's' while the healthy variant of the [[allele]] is [[Dominant Allele|dominant]] and shown with a capital 'S'. This shows how two [[heterozygous]] parents who do not have symptoms of [[Sickle Cell Anemia]] may carry the [[disease]] and pass it on to their [[offspring]]. This shows there is a 25% chance of a child [[Heredity|inheriting]] [[Sickle Cell Anemia]].
|}