Introduction +11.4

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

Welcome back!

Today

Catching up

Rules

The upcoming weeks

11.4 (pre-knowledge of ch12)

My holiday

How was your holiday?

1. In pairs 

Discuss your holiday with your neighbor. 

2. With the whole class

Tell me about your neighbors holiday!  Keep it short!

What I expect from you:

- Positive attitude

- Showing respect

- Take responsibility

- Create safety

This schoolyear

We work in our books. 

Laptops only necessary for:

- Checking your homework

- Small tests

- LessonUp

- Sometimes I will ask you to bring it for other purposes like practice tests and working on papers.

CH12 (and 11.4 +11.5) Heredity and evolution (ST+BT)

CH8 Your body works (BT in testweek)

CH9 Health (BT)

CH13 Animals and plants (ST)

CH14 A sustainable lifestyle (BT CH13+CH14 in testweek)

11.4 You look like..

You will learn why you look like your parents, which characteristics are hereditary and what the causes are for congenital disorders.

You look like

Cell> nucleus> chromosomes > DNA> gene

Chromosomes = thread-like structures, mainly composed of DNA

DNA = DNA contains the blueprint for all hereditary characteristics of an organism

Each cell has 23 pairs of chromosomes; a total of 46 chromosomes

Genome = all chromosomes together

Why you look like your parents

A cell of 46 chromosomes splits into two reproductive cells.

Reproductive cells contain 23 chromosomes

During fertilisation, the cells fuse.

Development of a boy or a girl

An egg cell always passes on an X chromosome

A sperm cell either passes on an X chromosome or a Y chromosome

What?	Read: 11.4 p 146,147. Make: assignments 1-10
How?	In your book. You may consult in a whisper.
Help?	Raise your hand.
Time?	10 minutes
Finished?	Read 148-150
Proceeds	You have finished your homework! Well done!