Science // Biology // B1 // Chromosomes, DNA, and genes //
- Created by: ameburrell9
- Created on: 27-11-14 17:09
View mindmap
- Genetics and DNA
- Inside the nucleus and chromosomes
- Definitions
- Chromosome
- 1000's of coils of genes
- Genes
- Comprise 'DNA' that decides our characteristics.
- DNA
- Deoxyribose Nucleic Acid (chemical)
- Chromosome
- A human egg cell and sperm cell contains 23 chromosomes
- Embryo therefore contains 23 pairs of chromosomes
- Each pair contains a gene from your mother, and a gene from your father
- So each pair contains two "options" for a characteristic
- These options are called alleles e.g gene = eye colour alleles = blue eye colour, brown eye colour ect
- So each pair contains two "options" for a characteristic
- DNA and the Human Genome project
Comments
No comments have yet been made