1 / 35

Your Phenotype is showing!

Your Phenotype is showing!. http://youtu.be/ accjGm9HrBw. Open your text book to page 135. What is DNA? Where is DNA found? How are genes related to DNA?. Heredity 101. Text Book Pages 98-112. By PresenterMedia.com. What Do You See?. And?. They Sure Look a Like!!!.

omar
Télécharger la présentation

Your Phenotype is showing!

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Your Phenotype is showing! • http://youtu.be/accjGm9HrBw

  2. Open your text book to page 135 What is DNA? Where is DNA found? How are genes related to DNA?

  3. Heredity 101 Text Book Pages 98-112 By PresenterMedia.com

  4. What Do You See?

  5. And?

  6. They Sure Look a Like!!! • HEREDITY: The passing of genetic traits from parent to offspring • Choose someone in class without saying anything • Write down at least 5 words to describe them (physical and behavioral) • Share with a partner and see if you can guess the mystery classmate!

  7. So Lets Break This Down! • CHARACTERISTIC: a feature with different forms in a population • Hair color, height, eye color, nose length, kindness, sense of humor, etc. • TRAITS: The different forms of a characteristic • Red hair, black eyes, short nose, extremely nice, absolutely hilarious • Next to your traits, identify the characteristic they are describing • EXAMPLE – tall (trait) – height (characteristic)

  8. Game Time!!! • Play rock, paper, scissors with a neighbor • 3 minutes – GO • Let’s debrief – what happened? • One More.. • Fold your hands together • Which thumb do you have on top? • Let’s count! • Characteristic – folding our hands • Trait – right over left or left over right • The bigger number was which trait?

  9. Dominant and Recessive Traits

  10. Some traits appear to have more power! Paper to rock! • Dominant: a trait that will appear in the the offspring if one of the parents contributesit; Shown with a CAPITAL letter • Brown hair, dimples, freckles • Recessive: a trait that must be contributed by both parents in order to appear in the offspring; Shown with a LOWERCASE letter • Blonde hair, straight hair, thin lips

  11. How Do We Get Them? • From Mom and Dad! • It is in the GENES: A set of instructions for an inherited trait • Found on DNA strands • Determine which traits you get!! • You have 2 forms of the same gene for every characteristic • These are called ALLELES: different forms of the characteristic – traits! • Found ON the chromsome • Where do they come from????

  12. Review! • We are who we are because of HEREDITY • Our GENES are from our parents and determine our TRAITS • They can be DOMINANT or RECESSIVE • The different forms from our parents are ALLELES

  13. Lets Talk Dimples! • We have genes from our parents • 1 set from Mom and 1 set from Dad • 2 forms for each characteristic called: alleles • Dimples and no dimples (Dd) OR dimples and dimples (DD) OR no dimples and no dimples (dd) • But only 1 allele actually shows up that we see… • Dimples! (D)

  14. Genotype: the entire genetic make-up of an organism • The 2 alleles you have for every trait • Hereditary conditions like cancers, alcoholism, obesity, heart disease, acne • The secrets! Your whole make-up!!! • Phenotype: The outcome of the genes, or what we SEE, the appearance • Dimples, straight hair, brown eyes, tall, rolled tongue • What your genes picked to make you YOU!

  15. A Little More About Alleles • An individual with identical alleles of a gene is homozygous for that gene • Examples: BB or bb, TT or tt • Purebred • An individual with non-identical alleles of a gene is heterozygous for that gene • Examples: Bb, Tt, Aa (Capital letter ALWAYS first!) • Hybrid

  16. Check Point! • I see a person with black hair, green eyes, detached earlobes, and their tongue rolled. Am I looking at the genotype or phenotype? • A strand of DNA has 2 alleles for every characteristic! Wow! Is this the genotype or phenotype? • What do we call 2 alleles that are both either dominant or recessive? How do we write it? • What is a heterozygous pair of alleles?

  17. What traits do you have? • We will go through the most common traits that people have • On your sheet, record if you have the mentioned trait or not • You may have to ask your neighbor for help 

  18. Detached (EE, Ee) or attached (ee) Earlobes

  19. Can Tongue Roll (TT, Tt) or Can’t (tt)

  20. Dimples (DD, Dd) No Dimples (dd)

  21. Right (RR, Rr) or Left (rr) handed?

  22. Freckles (FF, Ff) No Freckles (ff)

  23. Curly (HH, Hh) or Straight (hh)

  24. Cleft Chin (CC, Cc) or No Cleft (cc)

  25. Allergies (AA, Aa) or No Allergies (aa)

  26. Hand Clasp Right over Left?

  27. Normal (BB, Bb) Color Blindness (bb) Can you see the number inside the circle? If you cannot, you may be colorblind

  28. Widow’s Peak (WW, Ww) or Straight (ww)

  29. Collected Data • Does your data support which of your genes are dominant or recessive? • Now that I know my alleles or my genotype, can I predict what my offspring will look like or be able to do???

  30. Punnett Squares! • YES!!! • Punnett Square: A diagram used to organize all possible combinations of offspring from particular parents

  31. Lets Try!

  32. So What Does It Mean? • Receiving alleles is totally random • Probability: the mathematical chance that something will happen • Determine probability based on your Punnett Square! • What are my chances that my banana will be yellow? • How about green? THINK: If there is a 75% chance that the banana will be yellow, does that mean that it WILL be yellow??? ****Probability only gives you a CHANCE – it doesn’t reveal the ANSWERS!!

  33. Exit Post-It • Create a diagram to show the relationship and location of and among genes, chromosomes, alleles, and DNA.

More Related