Slide 1 / 43 Slide 2 / 43 1 Where do you get your traits from? Mendelian Genetics Slide 3 / 43 Slide 4 / 43 2 True or False: 3 What is the difference between the products in mitosis and meiosis? Only animal cells contain DNA. Slide 5 / 43 Slide 6 / 43 4 One parent is 6' tall. The other is 5' tall. 5 Define the term "phenotype." Geneticists predict that each child they have will be 5'6" tall. What hypothesis is represented here?
Slide 7 / 43 Slide 8 / 43 6 In Mendel's experiments, he bred two purple 7 How many alleles for a trait does an flowers and ended up with some white flowers. individual get from each parent? How do you think this happened? Slide 9 / 43 Slide 10 / 43 9 Fill in the following traits for you, your mom, 8 Correctly label each of the allele pairs and your dad: below as either "Homozygous" or "Heterozygous": Your traits Your Mom's traits Your Dad's traits a) AA Hair color Eye color b) Aa Earlobes (attached or hanging?) Hairline (widow's c) aa peak or straight hairline?) Left or right handed? Can roll tongue? Dimples? Freckles/No freckles? Slide 11 / 43 Slide 12 / 43 10 Using the information from question #9, do 11 How many pairs of chromosomes do you have more traits in common with your humans have? mom or your dad? Why do you think this is?
Slide 13 / 43 Slide 14 / 43 12 In order to swim better, an organism 13 What characteristics do scientists look for stretches its feet to make them longer. in an organism when they are preparing This trait is then passed on to the for an experiment? offspring. What hypothesis is represented here? Slide 15 / 43 Slide 16 / 43 14 Define the term "allele." Using Punnett Squares Slide 17 / 43 Slide 18 / 43 15 Complete the sentence: Human sex cells 16 Pat is getting dressed for school. He has contain __________ of the DNA of a 4 different pairs of sneakers he can wear normal body cell. and 4 different baseball caps. If he wants to choose one of each, how many different combinations can he make?
Slide 19 / 43 Slide 20 / 43 17 What type of letter do we use to represent 18 Define the term "genotype." a dominant trait? What type of letter is used for a recessive trait? Slide 21 / 43 Slide 22 / 43 19 Does phenotype determine genotype, or is 20 Cats can either have a curly tail or a it the other way around? straight tail. Curly tails are dominant and are represented by "T." Using this information, write the allele pairs for each of the following: a) A homozygous recessive cat b) A homozygous dominant cat c) A heterozygous cat Slide 23 / 43 Slide 24 / 43 21 Use question #20 to answer the following 22 Set up and complete Punnett Square questions: that crosses a homozygous dominant organism (AA) with a heterozygous a) What kind of tail does the homozygous organism (Aa). recessive cat have? b) What kind of tail does the homozygous dominant cat have? c) What kind of tail does the heterozygous cat have?
Slide 25 / 43 Slide 26 / 43 23 Use the Punnett Square in question #22 24 Why would geneticists use a Punnett to answer the following questions: Square? a) What percentage of organisms displays the dominant trait? b) What percentage of organisms displays the recessive trait? Slide 27 / 43 Slide 28 / 43 26 Elizabeth is designing her bedroom. She 25 Jean wants to do one page of her science workbook and one page of her spelling needs to pick one type of bed, one workbook. There are three pages of dresser, and one chair for her room. science that she can choose from and When she went to the furniture store, she there are 7 different spelling pages she noticed that they had 2 different types of can do. How many different combinations beds, 5 different dressers, and 10 different of workbook pages can she make? chairs available. How many different combinations can she make? Slide 29 / 43 Slide 30 / 43 27 Correctly label each of the allele pairs. 28 Set up and complete Punnett Square that ("Homozygous dominant" "Homozygous crosses a homozygous recessive organism recessive" or "Heterozygous") (aa) with a heterozygous organism (Aa). a) Aa b) AA c) aa
Slide 31 / 43 Slide 32 / 43 29 Use the Punnett Square in question #28 to answer the following questions: a) What percentage of organisms displays the dominant trait? Genetic Mutations b) What percentage of organisms displays the recessive trait? Slide 33 / 43 Slide 34 / 43 30 What are the 4 bases that make up DNA 31 How do the bases always pair up? (full names and abbreviations)? Slide 35 / 43 Slide 36 / 43 32 What is a mutation ? 33 What are three ways in which the environment can cause a mutation to happen in your DNA?
Slide 37 / 43 Slide 38 / 43 34 Provide an example (not from our slides) of 35 Where is the DNA found in the cell? how a genetic mutation could be helpful to an organism. Slide 39 / 43 Slide 40 / 43 36 What makes up protein? 37 There are five different types of proteins, each with a different job. Name them and describe each of their jobs. Slide 41 / 43 Slide 42 / 43 38 What is the different between an acquired 39 Provide an example (not from our notes) of a mutation that would neither really help nor mutation and a hereditary mutation ? hurt an organism.
Slide 43 / 43 40 What causes Down Syndrome in babies?
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