Mitochondria

Somatic tissue

Somatic tissue

Somatic tissue

Somatic tissue

Somatic tissue

Bone

Bone production

Modeling bone

Melanocytes

Somatic tissue

Skin

Gametes

DNA

• Deoxyribonucleic acid

• 1. Nuclear DNA– In nucleus of cell

• + proteins, form a chromosome

– A set of DNA molecules is called a genome.

• 2. Mitochondrial DNA– In mitochondria

• Cytoplasmic organelle

– Inherited from mother only

DNA structure

• Double helix• Basic building block is the nucleotide

– phosphate group + deoxyribose + base• Bases: adenine, guanine, thymine, cytosine• Complementary base pairs: A-T; G-C

DNA function1. replication

Backbone does not vary within or between DNA moleculesSo backbone can be represented by a straight line

Replication: Each of the 2 replicated molecules have 1 parent strand (old)and 1 daughter strand (new)

Complementary base pairing