Zusammenfassung der Ressource
GCSE Biology
- DNA
- Base pairs
- Adenine
- Thymine
- Cytosine
- Guanine
- Joined together by weak hydrogen bonds
- Section of DNA is called a gene
- Structure is a double helix
- People who discovered the
structure of DNA
- Franklin
- Crick
- Watson
- Wilkins
- Mitosis
- Makes new cells for Growth and
Repair
- Body cells reproduce
- Important for
- Growth
- Replacing damaged cells
- Asexual reproduction
- End up with two genetically identical cells
- called diploid cells
- Meiosis
- Gametes (sex cells) are produced
- Produced in the ovaries or the testes
- Gametes are haploid
- Have one copy of each chromosome
- End up with four genetically different haploid cells
- Stem cells