The Role of DNA in Reproduction

  1. DNA carries the genetic instructions that shape every cell and trait.
  2. Half comes from the mother’s egg, half from the father’s sperm.
  3. Genes determine everything from eye color to metabolism.
  4. Each person has about 20,000 genes arranged on 23 pairs of chromosomes.
  5. Mutations can create diversity β€” or lead to genetic disorders.
  6. DNA replication ensures accurate inheritance with every generation.
  7. During fertilization, random gene mixing creates one-of-a-kind individuals.
  8. Even identical twins have subtle DNA differences over time.
  9. Genetic testing can reveal ancestry and inherited traits.
  10. DNA is the language of life β€” passed from one generation to the next.