5.1.1 Chromosomes, Genes, and DNA

• Chromosomes come in pairs.


  True
• Genes are sections of DNA that control specific traits.

  True
• Alleles are different forms of a gene.


  True
• DNA stores genes, which are responsible for specific traits.


  True
• The phosphate group in a nucleotide attaches to the deoxyribose sugar to link nucleotides and form DNA
• Match the nitrogenous bases with their correct pairing:

  Adenine (A) ↔️ Thymine (T)

  Guanine (G) ↔️ Cytosine (C)
• Chromosomes are structures found in the nucleus of cells that contain the genetic material known as DNA
• Chromosomes contain genes, which are the basic units of inheritance
• Each gene occupies a specific location on a chromosome
• DNA has a double helix structure made up of two long strands of nucleotides
• What type of sugar forms part of the nucleotide structure in DNA?

  Deoxyribose
• Genes are segments of DNA that control specific traits.


  True
• What are chromosomes?

  Structures with genetic material
• What determines the number of chromosome pairs in a species?

  The species itself
• What information do genes carry?

  Genetic information
• What does DNA stand for?

  Deoxyribonucleic Acid
• Match the structure with its description:

  Chromosomes ↔️ Paired thread-like structures

  Genes ↔️ Segments of DNA

  DNA ↔️ Double helix
• The nitrogenous bases in DNA carry the genetic code.


  True
• What structures contain DNA and genes within the cell nucleus?

  Chromosomes