DNAProtein Synthesis

Replication

DNA carries a code for proteins

What are proteins used for?

What are proteins used for?

What are proteins used for?

DNA

protein

DNA

protein

Stays in nucleus

made byribosomes

DNAmessenger

protein

http://www.johnkyrk.com/DNAtranscription.html

1. One side of DNA is ‘transcribed’ to messenger RNA.

http://www.wisc-online.com/objects/ViewObject.aspx?ID=AP1302

2. Messenger RNA is ‘translated’ to make proteins.

Replication: making copies of DNA so cell can divide into two new cells

Replication in Prokaryotes

Replication in Prokaryotes

Replication in Eukaryotes

(they have a nucleus)

Mitosis

Meiosis

This replication makesSperm or Egg cellsfor reproduction.Note they are all

different.

Asexual reproduction No mixing of DNA

You get the same organism

Sexual reproduction DNA is mixed to make new organism

Egg and Sperm

Plants

Sexual reproduction DNA is mixed to make new organism

Egg and Sperm

Fungi

Sexual reproduction DNA is mixed to make new organism

Egg and Sperm

Animals

Sexual reproduction DNA is mixed to make new organism

Egg and Sperm

Humansare

Animals

Some organisms reproduce in different ways for different reasons.

Everything is fine.No reason to change.

Everything is fine.No reason to change.

Tsunami or big waves.Coral is in pieces.

Everything is fine.No reason to change.

Tsunami or big waves.Coral is in pieces.

Environment changes.Rapid evolution needed.