2TTO MH - Unit 5 - Basic 1 (part 2)

• Biologie / Verzorging
• Middelbare school
• vmbo t
• Leerjaar 2

Basic 1

Genotype and phenotype

Where in your body do you find
the chromosomes?

How many chromosomes does
a human have?

Chromosomes

46 chromosomes in every cell

Chromosomes occur

in pairs:

  - one from your father
  - one from your mother

Chromosomes

Every cell in your body contains the same chromosomes, so the same information!

Chromosomes & genotype

Genotype:

The information for all your inherited characteristics.

(= All the information that is "written" on your chromosomes). 

Are all chromosomes 46 chromosomes of a human being equal?

1. Yes
2. No

How many chromosomes can be found in the nucleus of a human muscle cell?

How many pairs of chromosomes can be found in the nucleus of a human skin cell?

Does a cell in your liver contain
information about your eye colour?

1. Yes
2. No

Look at these two pictures: you see an actor is one of his most famous roles.

Do these two persons have the same phenotype?

1. Yes
2. No

Do these two persons have the same genotype?

1. Yes
2. No

How is the phenotype determined?

Hair colour: DNA

Hair-do: hairdresser

How is the phenotype determined?

White skin: DNA

Red skin: sun

How is the phenotype determined?

By a combination of:

   - the genotype  (= DNA / chromosomes)

   - the environment  (including your own choices)

Part of your phenotype
determined by your DNA

Part of your phenotype
determined by the environment