Unit 5.1 Genotype and Phenotype

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

Unit 5 

Heredity and evolution

Basic 1 

Genotype and phenotype

Today's planning

Unit 5 (Book 2/3 B)

Basic 1 Genotype and Phenotype

• Explanation
• Quiz 

Learning objectives: 

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 

Characteristics such as

What colour your eyes are

How many arms you will have.

How long fingers you should have

But also

Information about how to make proteins, How to make sweat, how your skincells can produce hair.

                                                        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

Make exercise 1 to 9

BS 5.1