Genes and all that

They are made of a chemical called DNA

• Organisms

• Genes

• Traits

• Cells

All our body cells contain this chemical

• Chromosomes

• Sulphuric acid

• DNA

• Proteins

We humans get 23 of these from our mum and 23 from our dad

• Chromosomes

• Genes

• Brain cells

These tell a cell how to function e.g. be a brain cell, be a heart cell, be a lung cell

• Traits

• Chromosomes

• Genes

It is a very thin, very very long molecule made of four proteins

• Oxygen

• Chromosomes

• DNA

• Genes

A trait is..

• Something you are good at, like drawing or gymnastics

• A characteristic about you, such as the color of your eyes or hair, or your height

• Something healthy to eat

These control inherited traits like, for example, skin colour and if we can roll our tongue

• Genes

• Chromosomes

• Cells

We have around 50, 000, 000, 000, 000 of them

• Genes

• Chromosomes

• Cells

• Traits

If a trait controlled by a gene (or genes) is dominant, this means

• It is hidden and doesn´t show

• It shows (like brown eyes or being able to roll your tongue, for example)

• It fights other genes and destroys them

We share 99.5 per cent of our DNA with ...

• Chimpanzees

• Bananas

• Other human beings

• Rhesus monkeys