Chromosomes, genes and DNA

Apuntes

• Subtopic: Learning Objectives You will learn: - How chromosome structure relates to the molecule of DNA, some sections of which are inherited. - To describe the role of genes and analogies. - To understand that models and analogies can change according to scientific evidence. • Subtopic: Chapter 3, Topic 2 – Chromosomes, Genes, and DNA **Starting Point** The nucleus of a cell contains instructions that determine how an organism develops and functions. If DNA is a molecule made to inherit variations caused by an organism's parents, then DNA is a substance found in the nucleus of every cell in an organism. It carries genetic information. **Key Terms** - **Chromosome:** Structure of DNA that carries genetic information. - **DNA:** The substance that carries genetic information. - **Gene:** A section of DNA that contains instructions for a characteristic. These sections are called genes. They control traits such as color, height, or length. Sometimes, many genes act together to determine the characteristics of an individual. **Chromosomes** One extremely long DNA molecule is folded up together with other proteins to form a chromosome. Different species have different numbers ...