U5 B4 2HVTTO

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

B4 The theory of evolution

• Take off your jacket
• Put your things on your desk

       Book, notebook, pencil case

• Bag on the floor
  
• Read pages 125-128

Lessongoals

• You can describe the theory of evolotion
• You can list and explain the 3 main 'parts' of evolution
• You can name  examples  in support of the theory of evolution

Wheel of homework

Go to Lessonup.app and use this code

Reward

Penalty

Senna dyes her hair blond. Weeks later, she has her original hair colour again.

What has happened?

1. The genotype changed, later the phenotype changed the genotype back to how it was
2. The phenotype changed, later the phenotype changed the genotype back to how it was
3. The phenotype changed, later the genotype changed the phenotype back to how it was
4. The phenotype changed, later the phenotype changed the phenotype back to how it was

Which cells in the body contain genes for body size?

Pick the most correct answer

1. Cells in the legs
2. Cells in the legs and bones
3. Cells in the legs, bones and brains
4. Cells in the legs, bones, brains and eyes

The picture shows an eye
cell with its chromosomes of an unknown organism.

Which of the answers shows a possible look for a cell of this organisms intestines?

1. 
2. 
3. 
4. 

The picture shows an eye
cell with its chromosomes of an unknown organism.

Which of the answers shows a possible look for a sperm cell of this organism?

1. 
2. 
3. 
4. 

Each gene has many variants (blond, brown, ginger, etc).
If you were able to look in someone's DNA and see the variants of 1 gene.
What would be the highest amount of variants you could find?

1. 1
2. 2
3. 3
4. 4

What isn't a mutagenic influence?

1. Sunlight
2. Röntgen radiation
3. Smoke
4. Water

Both parents are homozygous for blond hair.
How big is the chance for their kid to be homozygous for
blond hair too?

1. 0%
2. 25%
3. 75%
4. 100%

Mother is homozygous and has blond hair
Father is heterozygous and has blond hair

Is it possible for their kid to have a different hair colour than blond?

1. Yes
2. No

The theory of evolution

Comparable to a fairy tale

I don't really know what it says, so I don't have an opinion

I'm not entirely sure about it. But don't think it's made up

I'm very sure it's absolute truth

Evolution has to do with ..

Evolution is about...

• The emergence of new species (all organisms)
  
• The way in which these species arise
  
• Determining which species are related to each other

Evolution is NOT about ..

• How life came to be
• How the universe/solar system/earth/etc. came to be
• If God exist

3 main mechanisms

Evolution can be summarized  into these 3 mechanisms:

1. Variation in genotypes
2. Natural selection
3. New species arise

Variation in genotypes

• Sexual reproduction > new/different genotypes
• New genotypes > new/differnet phenotypes
• Lot's of changes in genotype >    DNA changes 'too' much > new species

Natural selection

• Species who have adapted to 

        their environment will survive

        and reproduce

• 'Good' genes are  passed  on
• 'Bad' genes dissapear

New species arise

Animals of same species are  split up

The environment slowly changes.

Because of natural selection, other genes are 'good' in new environment

Species have become different species after many years of evolution, due to living apart

more examples

New species arise

• New species arise due to LONG periods of evolution in a species
• Many small changes together  become big changes

• Evolution takes very long! (thousands of years)

What is the deciding 'thing' that tells you that two organisms belong to the same species?

This image makes me think ..

Evolution

Still comparable to a fairy tale

I understand it better, still don't really believe it

I don't understand it entirely, but seems logical

This is the way we got all the organisms we have today

What you should do:

• Read pages  125-128
• Do asgmt  1-7, 4 choice pgs. 128-130
• Challenge yourself: 8, 9

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do:

• Read pages 125-128
  
• Do asgmt 1-7, 4 choice pgs. 128-130
  
• Challenge yourself: 8, 9

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish