Can DNA change?

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 3

Welcome!

Vandaag: 

Origin report 

Looking towards the rest of the year (almost over sad :()

Repeating questions about DNA

Explanation about changes in DNA (TB page 212)

Making exercises

What's the smallest part?

1. Nucleus
2. Base pairs
3. Chromosomes
4. DNA

Proteins consist of...

1. Protein parts
2. Glucose
3. Amino acids
4. Nucleotides

What letters are on the opposite DNA strand when this strand is as follows:
CTAAGCTGGCATTA

... is made using DNA, and transferred to ribosomes to make proteins.

What amino acid is formed after AGU is read?

With which codon does a ribosome always start translating mRNA to amino acids?

What are we going to learn today?

Today we'll be learning:

What happens when DNA changes. 

How DNA can change. 

What the consequences of changed DNA can be. 

Mutations

A change in DNA is called a mutation. DNA can change for a bunch of different reasons. The consequences can differ from being non existent to life changing. A mutation in a sex cell often has way different consequences than a mutation in a body cell. 

There are a lot of influences that determine the change of mutations, but it can also just happen during mitosis. 

Possible results mutations

Causes mutation(mutagenic influences/carcinogens)

www.dw.com

Cancer

Sometimes a mutation results in a cell dividing infinitely; at this moment a tumor is formed. Sometimes a tumor stops dividing at one point, but the tumor can also be malignant (kwaadaardig). These are called as such because they reproduce infinitely, stealing resources from other cells as they do so. This disease is called cancer. 

Development of cancer

Get to work!

Start with the exercises on page 50. When you are finised with those you can make the exercises found on page 33. 

When you're finished with the homework, you can study for the test by checking the excercises, working out the learning goals or make a summary.