Biology GCSE (1)
- Created by: Krista June Butler
- Created on: 18-05-11 15:07
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gene - DNA - chromosomes in nucleus
girl - **
boy - XY
mitosis - allows growth, repair and heal - 2 new daughter cells (identical)
cell has to make exact copy of chromosomes -> 2 seperate cells
meiosis - gametes, egg and sperm, 23 chromosomes each, haploid cells
only happens in reproductive
exact copy of dna, 1 of each pair gets seperated to each cell, then meiosis
a random selection from each chromosomes
enzymes:
biological catalysts
denatured - not killed - temperature and pH
temperature - increases, speeds up reactions but…
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