DNA en inheritance

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

Welcome!

• Overview of the next few weeks
• Start new chapter
• Homework

Upcoming weeks

• Start new chapter DNA and genetics
• Intermezzo: Science Fair 

Unit 5 

Heredity and evolution

Basic 1 

Genotype and phenotype

After today

You can explain the difference between genotype and phenotype

You can explain that cells only use the hereditary information that they need

Let's do a little inventory..

Which characteristics do you have?

Make sure you write down the results

I can roll my tongue

YES

NO

Which hand do you write with?

LEFT

RIGHT

NO PREFERENCE

Hand clasping?

Body cells, chromosomes, DNA

Chromosomes

Inside the cell nucleus are structures called chromosomes

They are DNA strands and contain all of your inherited characteristics

Genes

A gene is a peice of DNA that contains the information for a characteristic 

                                                        Each body cell contains all the 
                                                   genes but not all genes are active

To inherit = to receive a characteristic from an ancestor by genetic transmission. 

• Genotype = the information for an organism’s complete hereditary characteristics
• Phenotype = visible and invisible physical characteristics of an organism

           Phenotype = genotype + environmental factors. 

Phenotype = genotype + environmental influences

The phenotype changes…

…but the genotype doesn’t.

If you look at this persons hair..

1. Phenotype
2. Genotype
3. Phenotype en Genotype

The eye color of these people are.

1. Phenotype
2. Genotype
3. Phenotype en Genotype

Put in the correct order,
from small to big.

1. cell - chromosome - DNA - gene
2. gene - chromosome - DNA - cell
3. gene - chromosome -cell - DNA
4. gene - DNA - chromosome - cell

Which one is correct?

1. Phenotype = genotype + environment
2. Environment = genotype + phenotype
3. Genotype = phenotype + environment

LET'S PRACTICE

Unit 5 

Basic 1 

Question: 2,3,4,6 and 8

Welcome!

• Quiz last lesson
• Instruction basic 2
• Homework 
• 
  

Genotype or phenotype?

All cells have the same DNA -> True or False 

Stripes, genotype or phenotype?

What's DNA a gene and chromosomes?

Genotype or phenotype?

After today

You can explain how each of the parents provides 50% of the chromosomes.

 You can say how the sex of a human is determined by sex chromosomes.

 You can explain how sexual reproduction causes variation in genotypes.

Grab your notebook!

We are going to make notes!

Homework!

Unit 5

Basic 2 

Question