Science
Ecosystems & Habitats
Conceptual
12–13 yrs
Chromosomes, Genes & DNA
染色体、基因与DNA
Description
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
Mastery Evidence
- Explains the hierarchy: DNA → gene → chromosome → nucleus → cell
- Describes what a gene is and what it codes for
- States that human body cells contain 46 chromosomes in 23 pairs
- Describes the contributions of Watson, Crick, Franklin, and Wilkins to the discovery of DNA structure
Assessment Prompt
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?
