Chromosomes

Welcome!
Today: 
Discussing homework, page 102
Questions about last lesson
Discussing chromosomes (5.2), page 108
Making exercises

1 / 14
volgende
Slide 1: Tekstslide
BiologieMiddelbare schoolhavoLeerjaar 2

In deze les zitten 14 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 45 min

Onderdelen in deze les

Welcome!
Today: 
Discussing homework, page 102
Questions about last lesson
Discussing chromosomes (5.2), page 108
Making exercises

Slide 1 - Tekstslide

Has the genotype or phenotype changed?

Slide 2 - Open vraag

Someone got skin cancer through sun radiation. Is the genotype or phenotype changed (or both)?

Slide 3 - Open vraag

A pollen (sex cell) of a tree has 64 chromosomes. How many chromosomes do the body cells have?

Slide 4 - Open vraag

What changes more throughout your life?
A
Phenotype
B
Genotype

Slide 5 - Quizvraag

What are we going to learn?
We will be learning:
How you get 50% of your genetic material from one parent. 
How sex is determined by chromosomes. 
How every child is different thanks to sexual reproduction. 

Slide 6 - Tekstslide

Cell -> DNA

A body cell has a nucleus, this nucleus contains 46 chromosomes. These are long strings of DNA. These contain all your genetic material: your genotype. A gene is a piece of DNA that says something about one characteristic.

Slide 7 - Tekstslide

Chromsomes
Each human body cell has 46 chromosomes. These occur in pairs. These pairs have the same genes, but different variations on them. You also have your sex chromosomes, which determine your gender.
You get one of the chromsomes of the pair from the sperm, and one from the egg. 

Slide 8 - Tekstslide

Variants of genes

Slide 9 - Tekstslide

Sex cells
Sex cells can develop from body cells. These cells play a major role in reproduction. The division of a body cell into a sex cell is called meiosis.

Because the chromosomes that are passed along to a certain sex cell is different, you get variation in genotype.

Slide 10 - Tekstslide

Let's get started with the exercises!
Make the exercises of paragraph 5.2, starting on page 111. You don't need to make exercise 6. 

You work in silence for the first 10 minutes. 

Slide 11 - Tekstslide

Een menselijke cel heeft 23 chromosomen, dit is een...
A
Lichaamscel
B
Geslachtscel

Slide 12 - Quizvraag

Waardoor word het geslacht van een kind bepaald?
A
Zaadcel
B
Eicel
C
Zaadcel & eicel
D
Geen van beide

Slide 13 - Quizvraag

De chromosomen van hetzelfde paar hebben wel dezelfde genen, maar andere varianten.
A
Juist
B
Onjuist

Slide 14 - Quizvraag