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DNA

DNA. Mrs. Baxter and Mrs. Herndon 5th Life Science. 1. Genetics  is the study of genes, heredity, and  genetic variation in living organisms. . https:// genetics of a four leaf clover. https:// brain pop DNA /.

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DNA

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  1. DNA Mrs. Baxter and Mrs. Herndon 5th Life Science

  2. 1. Genetics is the study of genes, heredity, and geneticvariation in living organisms.  https://genetics of a four leaf clover

  3. https://brain pop DNA/ 2. DNA - carries the genetic information for a cell and is a set of instructions that tells the cell what to do or be. 3. Chromosome – a single long molecule of DNA (x shape).

  4. 4. Gene – a part of the chromosome that contains DNA

  5. Traits: http://online traits video/

  6. Genetic traits

  7. 5. Inherited trait – a characteristic passed from parents to their offspring. 6. Dominate trait – a strong trait that appears even if the organisms has only one factor. 7. Recessive trait – a trait that appears only if an organism has two factors. 8. Hidden trait – a trait that an organism carries, but is not expressed.

  8. H - black t - spotted HH= dominant Ht = dominant tt = recessive H t HH Ht tt Ht

  9. DNA (Deoxyribonucleic Acid) • Is the chemical code that gives you your inherited traits like hair color, eye color, height, handedness and tongue rolling DNA BrainPop

  10. Famous DNA ScientistsRosalind Franklin: an English scientist who made the first x-ray images of DNA DNA X-ray

  11. Maurice Wilkins gives Franklin’s x-rays to Watson and Crick • Francis Crick and James Watson make a model of DNA Maurice Wilkins discovery/history 1950’s -1960’s

  12. Watson and Crick • Franklin dies of cancer • Wilkins, Watson, and Crick share a Nobel Prize for the DNA model

  13. 9. Genetic mutations: occur when there are changes in a cell’s DNA. Albinism – loss of pigmentation in the skin, hair, and eyes

  14. https://brainpop genetic mutations/

  15. Obj. What is an Adaptation? • 10. Adaptations: inherited traits that help living things meet basic needs and survive in their environments • 11. migration: an inherited trait that causes some animals to move to different places in order to survive. • 12. extinction: the death of all organisms of a species. BrainPop Page 162-163 in science textbook

  16. 3 Types of Adaptations: • 1. Physical • 2. Behavioral • 3. Life processes • Study Jams – Animal Adaptations

  17. StudyJams video

  18. What Other Factors Affect Characteristics? Pages 168-176 in textbook

  19. Vocabulary: instinct: a behavior that an organism inherits Learned behavior: a behavior that an animal acquires through experiences Environment: all the living and nonliving things that surround and affect an organism

  20. Instincts Brainpop In your journal, answer the question: What effect do instincts have on an animal’s survival? Page 172-173

  21. What are Learned Behaviors? Answer in your journal: How are most animal behaviors learned? Page 174-175

  22. Environmental Influences All living things have needs: food, water, space, and shelter. * Changes in the environment force animals to change their behavior. * Sometimes, the environment causes a physical change in a species over time. Page 176

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