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Combined Science
Edexcel GCSE Combined Science
Biology
Genetics
Reproduction and DNA
Edexcel GCSE Combined Science · 1SC0
Reproduction and DNA
What you need to know
Explain the role of meiotic cell division in producing four genetically different haploid daughter cells (gametes).
Describe the structure of DNA as a polymer comprising two strands coiled to form a double helix.
Explain how DNA strands are linked by a series of complementary base pairs joined by weak hydrogen bonds.
Describe the structure of nucleotides, identifying the sugar and phosphate group attached to one of four different bases.
Describe the genome as the entire DNA of an organism and define a gene as a specific section of a DNA molecule that codes for a protein.
Explain the biological principles and methods behind extracting DNA from fruit.
Revision notes
1
Reproduction and DNA
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The Nervous System
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Inheritance