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Genes & Traits

Genes & Traits . Living things inherit traits and patterns. Observe the 3 siblings below…. How do we look alike? . Make a list of the characteristics you observe about Ms. Smith and her brothers. Traits. Some are inherited Similar to those your parents have Hair color Eye color

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Genes & Traits

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  1. Genes & Traits Living things inherit traits and patterns

  2. Observe the 3 siblings below… How do we look alike? Make a list of the characteristics you observe about Ms. Smith and her brothers.

  3. Traits • Some are inherited • Similar to those your parents have • Hair color • Eye color • Shape of your nose • Ears (attached, not attached) • Dimples • Some are acquired • You learn them over your lifetime • Language • Riding a bike • Reading & Writing

  4. Traits are controlled by genes Genes are located on your chromosomes You inherit genes from your parents Your cells contain 23 chromosome pairs (homologs) You get half from DAD and half from MOM

  5. Traits are controlled by genes You get genes from each parent Different types of genes are called ALLELES ALLELES are represented by 1 Letter Examples A c T

  6. 23 CHROMOSOMES **** 23rd chromosomes determines if you are a boy or a girl

  7. Alleles Interact to help us produce traits Phenotype (WORDS)-describes the physical characteristic that is displayed by your genes; observable (eye color, hair color) Genotype (LETTERS)- describes the actual genes that you have on your DNA

  8. Two forms of every gene DOMINANT Always expressed as a capital letter (T) RECESSIVE Always expressed as a lowercase letter (t) We have two copies of each ALLELE: 1 from DAD, 1 from MOM Alleles can be:

  9. Let’s make some offspring! • You are going to make your own baby! • You will flip your coin to determine if a trait will be DOMINANT or RECESSIVE. • Heads = DOMINANT • Tails = RECESSIVE • You will write down all your genotypes • Then, write your phenotypes using the key of traits • Draw your baby! CONGRATULATIONS! 

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