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Inherited traits
- 2. EssEntial QuEstions • Howare characteristics passed from parent to offspring? • What are some of the traits passed from parent to offspring? • What is an inherited trait? • What is an instinct?
- 3. Do you seeany ways that these children are similar to their parents or brothers and sisters?
- 4. inhEritEd traits • Lookaround. Is anyone just like you? You and everyone else are unique. No two people are exactly alike, including identical twins. • People in a family may have things in common. They can share traits. • A TRAIT is simply a characteristic that one possesses – Ex. freckles, green eyes, etc.
- 5. What is hErEdity? •Heredity is the passing of traits from parent to offspring. This includes your gender.
- 6. What arE ChromosomEs? •A packet of coiled up DNA • Humans have 23 pairs of chromosomes • There are 23 pairs of chromosomes f ound in the nucleus of any one of your cells
- 7. How are TraiTsPassed? • When organisms reproduce, traits are passed from parent to offspring. • These traits are carried in DNA, the Nucleus genetic material found in a cell’s ________ • DNA acts like a blueprint.
- 8. inHeriTed TraiTs • INHERITEDTRAITS are those traits that are passed down from parents to their offspring. – EX. In humans- eye color, hair color, skin color, freckles, dimples, etc. are all examples of inherited traits – EX. In animals- eye color, fur color and texture, facial shape, etc. are examples of inherited traits.
- 9. inHeriTed TraiTs- BiGidea! •Inherited traits are passed down from your parents! – Have you ever heard someone say “you look like your father” or “you have your mother’s eyes?” – Some inherited traits are not so easily seenthey affect structures inside your body.
- 10. examPles of inHeriTed TraiTs •This family has an inherited trait. Can you tell what it is? They have brown hair.
- 11. examPles of inHeriTed TraiTs •Some people have a genetic trait that creates indentations on their cheeks called dimples.
- 12. inHeriTed TraiTs inPlanTs •Plants also pass on traits to their offspring. This could include: flower color, shape, leaf shape, and plant height.
- 13. What are someinherited traits? • What are some inherited traits in animals? – – – – A tiger has stripes. A giraffe has a long neck. An elephant has a trunk. A snake has no legs.
- 14. examples of inherited traits •Look at the elephants. What traits do they have in common?
- 15. instincts – Inherited traitsinclude instincts. – An INSTINCT is a behavior that has been passed on from the parents that is ready to use without learning and that does not require practice • Ex. A lion’s instinct to catch prey • Ex. Sea turtles laying eggs on the beach • Ex. Bird migration • Ex. Making a nest- birds just KNOW how to build a nest correctly time after time
- 16. let’s revieW • Whichis not an inherited behavior? – – – – A. dimples B. reading C. freckles D. brown eyes
- 17. let’s revieW • Whatare inherited behaviors called? – – – – A. old behaviors B. recessive traits C. environments D. instincts
- 18. let’s revieW • Howis hunting both learned and instinctive in animals? – A. Animals learn to hunt. – B. Animals have the instinct to hunt. – C. Animals have the instinct to hunt but must learn hunting skills. – D. Animals have the instinct to teach their young how to hunt.
- 19. Let’s Review • Whatkind of behaviors do organisms inherit from their parents? • A. acquired traits • B. learned behaviors • C. instincts • D. eye color
- 20. Let’s Review • Plantsmake their own food through photosynthesis. Photosynthesis in plants is an example of _______. • A. an inherited trait • B. a learned behavior • C. an acquired trait • D. a life cycle
- 21. YouR assignment: Write aparagraph about at least three traits you share with your parents, brothers or sisters. You may also choose to write about what traits someone you know shares with his or her parents, brothers or sisters.