Lesson Sequence 1 2 3 4 Genetic Crosses

Lesson Sequence 1. 2. 3. 4. Genetic Crosses 5. 6. 7. 8. 9. 10.

Resources needed: • Genetic crosses Harry Potter worksheet. (1 per student) • Info sheet for teacher • Req: none

PLTS icons if needed

mercredi 15 décembre 2021 Level 15 December 2021 miércoles, 15 de diciembre de 2021 Genetic crosses Objective Outcome E/D Explain how recessive and Complete the starter successfully dominant genes interact C/B Interpret and draw punnet squares and family trees. Complete of 1 & 2 of Harry Potter tasks. Slides 19 - 23 AA* Consider the ethical issues of genetic counselling. Answer question on slide 31 and page Starter: Charlie has Hazel eyes. Her parents both have blue eyes. Draw a diagram to EXPLAIN how this can be Extension: Explain why you have some features that are similar to your siblings. Use the word allele in your answer. Keywords Dominant, recessive, punnet square, family tree. carrier

mercredi 15 décembre 2021 miércoles, 15 de diciembre de 2021 15 December 2021 Genetic crosses We need some definitions: match the correct word to the definition: Dominant Carrier Recessive Genotype Phenotype Your genetic make up What you look like Rr RR rr Extension: Explain why you have some features that are similar to your siblings. Use the word allele in your answer. Keywords Dominant, recessive, punnet square, family tree. carrier

mercredi 15 décembre 2021 15 December 2021 miércoles, 15 de diciembre de 2021 Genetic crosses We need some definitions: match the correct word to the definition: Dominant RR Carrier Rr Recessive rr Genotype Phenotype Your genetic make up What you look like Keywords Extension: Explain why you have some features that are similar to your siblings. Use the word allele in your answer. Dominant, recessive, punnet square, family tree. carrier

mercredi 15 décembre 2021 15 December 2021 miércoles, 15 de diciembre de 2021 Genetic crosses Naked Scientist animation! (from interactive book) Extension: Explain why you have some features that are similar to your siblings. Use the word allele in your answer. Keywords Dominant, recessive, punnet square, family tree. carrier

How are characteristics inherited? I don’t understand why she is a Witch if her parents are muggles? No wonder, Malfoy! You didn’t pay attention in my genetics lessons!!!

Inheritance of characteristics I still don’t understand why she is a witch… But it’s easy!!! Let me explain some Wizard Genetics to you

Like muggles, Wizards Let’s doinherit some It’s all Being allele for one The allele from their mum, Wizard genetics… How are Wizards made? in their genes!!!! a muggle being a Wizard is m dad and one allele from their is Thedominant allele for over is M being a muggle being a Wizard…. .

Wizards and muggles… Let’s do some Wizard genetics… The allele for being a Wizard is ……… The allele for being a muggle is ……… Being a muggle is …………… over being a Wizard

Wizards and muggles… Let’s do some Wizard genetics… Answer the questions on Wizard genetics on your worksheets. .

The Potters - What alleles do Harry’s parents have? - What were the chances of Harry being a Wizard?

Harry’s grandparents - What alleles do Lily’s parents have? What were the chances of Lily being a witch? What were the chances of Petunia being a muggle? What are the chances that Petunia is a “carrier”? Harry’s grandmother Harry’s granddad Lily Potter Petunia Dursley

The Dursleys Vernon Petunia Even if Petunia was a carrier of the Wizarding allele, is there any chance at all that Dudley was a Wizard? What are his odds at best (given his father is not a Wizard?

The Malfoys

The Grangers Why is Hermione a witch? What were the chances?

Tom Riddle was a half-blood. His mother was a witch and his father was a muggle. What alleles did his parents have? What were the chances that Tom Riddle was a wizard?

Hermione + Ron Will their children definitively be Wizards and Witches?

Filch Argus Filch is a squib. His parents were Wizards, but doesn’t really have any wizarding abilities. Suggest an explanation.

Harry + Ginny Speaking Parseltongue is a rare feature in the Wizarding world. Only descendents from Slytherin might have this ability. Harry speaks Parseltongue, but Ginny doesn’t and neither did Harry’s parents. Suggest if the allele for speaking Parseltongue is dominant or recessive: What are the chances that Harry’s and Ginny’s children speak Parseltongue if (a) Ginny isn’t a carrier and (b) if Ginny does carry the allele? (a) (b)

Harry + Voldemort (c) Actually, Harry didn’t inherit the two recessive Parseltongue alleles, but they were transferred to his DNA when Voldemort tried to kill him. What is the scientific name for this process?

Remus (a) Being werewolf (W) is dominant over not being a werewolf (w). Remus Lupin is a werewolf (Ww), but his wife , Nymphadora Tonks, is not. What are the chances that their son is a werewolf?

Remus (b) Both Remus and Nymphadora also carry the allele for speaking Parseltongue. What are the chances that their son is a werewolf who speaks Parseltongue?

Genetic crosses MID-LESSON PROGRESS CHECK Swap work with the person next to you. Are they on track to meet their target? Level Objective Outcome E/D Explain how recessive and dominant genes interact Complete the starter successfully C/B Interpret and draw punnet squares and family trees. Complete of 1 & 2 of Harry Potter tasks. Slides 1923 AA* Consider the ethical issues of genetic counselling. Answer question on slide 31 and page

Family trees

Family tree • Family tree genetic diagrams are used by doctors to provide genetic counselling for couples with genetic disorders prior to pregnancy. Q. Explain why they are useful and what ethical considerations such counselling might raise.

Plenary: What have you learnt today? Level Objective Outcome E/D Explain how recessive and dominant genes interact Complete the starter successfully C/B Interpret and draw punnet squares and family trees. Complete of 1 & 2 of Harry Potter tasks. Slides 1923 AA* Consider the ethical issues of genetic counselling. Answer question on slide 31 and page Plenary task Write one thing you know well this lesson and one thing you need to improve on. Next lesson: Inherited Disorders 5 mins