Chromosomes, Genes & DNA
Describe the relationship between chromosomes, genes, and DNA in heredity, including the double helix structure of DNA and the historical roles of Watson, Crick, Franklin, and Wilkins
Typical age: 12–13 years
“If your child was asked what DNA actually is and where it is in the body, could they explain the relationship between DNA, genes, and chromosomes — and say roughly how many chromosomes a human cell has?”
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DNA structure and replication depends on chromosomes and Mendelian inheritance
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Explaining genetic vs environmental causes of variation requires first knowing what genes and chromosomes are
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Mutation is defined as a change to the DNA sequence — the DNA model must be understood first
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