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Introduction to Traits & Inheritance

Introduction to Traits & Inheritance. March 1, 2012. DO NOW!!!. What is a Mutation? Name a disease associated with a genetic mutation. What are the symptoms of this disorder?

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Introduction to Traits & Inheritance

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  1. Introduction to Traits & Inheritance March 1, 2012

  2. DO NOW!!! • What is a Mutation? • Name a disease associated with a genetic mutation. What are the symptoms of this disorder? • List some physical characteristics you have…hair color, skin color, eye color, height. What makes you different (physically) from other individuals? Where did you get these traits from?

  3. Announcements: • Notebook Check on Friday • Parent Letters & Microbiology Tests • You will be discounted points • Sign up for Daily Teacher Assistant • You have to prepare the day before by reading & going through the Power Point online • Only one sign up until next week…if open slots are still available

  4. Agenda for 03/01 • Guided Notes: • What is a trait? • Inherited vs. Acquired • What determines inherited traits? • How do we indicate traits? • What is a phenotype? A genotype? • What makes a trait dominant or recessive? • Inherited Traits BINGO! • Class Survey Sheet (if we have time)

  5. What is a Trait? • A trait is a characteristic that describes you • Traits can be inherited (from your genetics) or acquired (something you learned.) • During genetics, we will be learning about inherited traits.

  6. Which of the following are inherited? • The Shape of you nose? • Your height? • Your love of Takis? • The color of your eyes? • Your ability to ride a bike? • The amount of stuff you know? • The color of your hair? • Your weight? • Your shoe size? • Your favorite color? • Your temper? • Your motivation? • Your hair texture? • Your skin color? • The size of your head? • Your allergies?

  7. What determines inherited traits? • Inherited Traits are determined by your genetics…the information that was passed down in your DNA from your biological mother and your biological father. • Heredity is the process of passing on genetic information from parents to offspring.

  8. In Biology, how do we indicate inherited traits? • Allelesare variations of the same gene. • In biology, we code the traits using letters. • Remember on the pre-assessment when you saw different letters such as “R” and “B”? These letters represent alleles.

  9. So what does it mean by genotype & phenotype? • The genotype is the actual genetic make-up of the organism….it is ALL the genes the organism has, even the ones that are not expressed. • The phenotype are the observable characteristics of the organism…what you can see or what is expressed.

  10. Dominant Vs. Recessive • We can determine whether an allele is dominant or recessive. Here are some quick definitions: Dominant: A term that describes an allele that determines the phenotype of an individual organism when two different copies are present in the genotype. • DOMINANT ALLELES ARE ALWAYS WRITTEN AS AN UPPERCASE LETTER.

  11. Dominant Vs. Recessive • We can determine whether an allele is dominant or recessive. Here are some quick definitions: Recessive: A term that describes an allele that is NOT expressed when combined with a dominant form of the gene. • RECESSIVE ALLELES ARE ALWAYS WRITTEN AS A LOWER CASE LETTER.

  12. Let’s Practice…Dominant or Recessive? • A? • a? • b? • r? • B? • G? • R? • d? • t? • P? • g? • T? • W? • k?

  13. Gregor Mendel We are going to learn more about him on Thursday during our literacy lesson. He is the father of genetics. He worked with pea plants back in the 1800s. He was a very cool guy.

  14. Have you had enough note copying????? • I apologize for all the notes…but I do appreciate all of your hard work and effort. I am now rewarding you with a fun activity! • Traits BINGO: You will each get a card. The winner (I will verify your card) gets a KING size candy bar of your choice. • If you are using a neighbor, you need to write down his/her name in that block when you color it in!

  15. Exit Ticket I need your exit ticket BEFORE YOU leave my classroom. • What is a trait? List 3 inherited traits and 3 acquired traits. • How do we represent dominant traits? Recessive Traits?

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