Presentation on theme: "David Elliott. Harry Potter and the Recessive Gene How Are Wizards Made ?"— Presentation transcript:
Harry Potter and the Recessive Gene How Are Wizards Made ?
How wizard genetics works ? All humans including wizards receive one copy of each gene from each parent
How wizard genetics works ? ● Some genes can be dominant ●Some genes can be recessive
How wizard genetics works ? ● Some genes can be dominant ●Some genes can be recessive And we are going to learn about this from Harry Potter!
The characters…………. Wizards and Witches
The characters…………. Squibs
And finally…………. Muggles!
How Are Wizards Made ? Being a wizard or a muggle is all decided by genetics
Let’s look at some examples from Harry Potter
First…………….Pure wizards are born from wizard families
How Are Wizards Made ? The gene for wizarding ability is w Wizards have two ww genes
The Malfoys Lucius Malfoy ( ww ) Narcissa Malfoy ( ww ) Draco Malfoy ( ) The Malfoys are a ‘pure blood’ family. From the past all their ancestors have been wizards so they must have the wizarding genes ww w w
Lily Potter ( ww ) James Potter ( ww ) Harry Potter ( WW ) Both Harry’s parents had magical ability so they must both have been ww –like all wizards They passed these genes on to Harry The Potters w w
The Weasleys are pure blood wizards so they all have the genes ww too
A special thing about the wizarding gene w (the gene to make a wizard) is recessive so you can only be a wizard if you have two w genes Remember, you get two copies of every gene
What about Muggles? Muggles have the other kind of gene - DOMINANT
How Are Muggles Made ? The gene for muggleness is M Muggles have the genes Mw or MM
How do you get wizards or witches from muggle families?
Hermione is a powerful witch so she But, both her parents are muggles so they must be Mm so they can give her a w gene each Mw ww
More examples from Harry Potter Next…………….Half-bloods
Tom Riddle is a ‘half blood’. His mother was a witch ( ww ) and his father was a muggle His father must have had the genes Mw so he could give him the other w gene ww Mw
More examples from Harry Potter Next…………….Muggles born in Wizard families
Filch is a ‘squib’ Both his parents are wizards (ww) so he should be too because he can’t get an M gene from either parent but he can’t do any magic This means he has a MUTATION so his wizarding powers don’t work! FILCH
In other words, his wizarding gene w has broken!
Some questions for you
What wizarding genes would Ron and Hermione’s children have ?
Ron (ww) Hermione (ww) Children ( ) w w The answer:
We all have dominant and recessive genes too
Dominant and negative genes Dominant genes: Brown eye colour Negative genes: Blue eye colour
Let’s take a look at you… Grab a partner… TRAITYesNo Free Earlobes (D) Attached Earlobes (R) Can roll tongue (D) Can’t roll tongue (R) Bent little finger (D) Straight little finger (R)