Genes
Gene mindmap, I hope can help!
- Created by: Rebecca Crackett
- Created on: 26-04-13 17:58
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- Genes
- Sections of DNA
- Found on chromosomes
- Humans have 23 pairs of chromo-somes (46 in total)
- Pairs of matching chromo-somes are called homologus pairs
- In a homologus pair both chromo-somes are the same size and have the same genes but can have different alleles
- Pairs of matching chromo-somes are called homologus pairs
- Humans have 23 pairs of chromo-somes (46 in total)
- They code for proteins (polypeptides)
- Contain information on how to make them
- Made from amino acids
- See PROTEIN CODING mindmap for more detail
- Nature and development of organisms is determined by genes
- DNA sequence determines amino acid sequence
- Proteins and enzymes formed
- Enzymes enable metabolic pathways (chemical reactions in the body)
- Metabolic pathways determine nature and devolpment
- Enzymes enable metabolic pathways (chemical reactions in the body)
- Proteins and enzymes formed
- DNA sequence determines amino acid sequence
- Can exist in different forms called Alleles
- Alleles code for slightly different versions of the same characteristic
- E.G. gene that codes for blood type exists as 1 of 3 alleles: 1 for type O, 1 for type A, 1 for type B
- Alleles code for slightly different versions of the same characteristic
- Mutations can lead to non-functioning proteins
- (changes in base sequence)
- Incorrect active-site shape
- (changes in base sequence)
- E.G. gene that codes for blood type exists as 1 of 3 alleles: 1 for type O, 1 for type A, 1 for type B
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