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Meiosis and Genetics Review

This activity involves reviewing chapters 10 and 11 on meiosis and genetics using a whiteboard. Topics covered include gametes, phases of meiosis, genetic variations, and Punnett squares.

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Meiosis and Genetics Review

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  1. Meiosis and Genetics Review Chapters 10 and 11 Complete on a whiteboard with your table partner (you can take your own if there are enough boards/markers).

  2. An individual with a genotype of AaBbCC is able to produce how many different types of gametes? FOUR

  3. Put the phases of meiosis in order. What is the end product of meiosis? • 3, 4, 1, 6, 7, 5, 2, 8 • 4 cells that are • genetically different from Parent and each other • Gametes • Haploid • ½ the # of chromosomes As the germ line cell

  4. Label the phases (remember to label if it is meiosis 1 or meiosis 2). These didn’t all come from the same cell, so label each independently Metaphase 1 Anaphase 2 Metaphase 2

  5. What is the chance of having three boys in a row? ½ x ½ x ½ = 1/8

  6. In the cross of two quadruple heterozygotes (AaBbCcDd x AaBbCcDd). What fraction of the offspring will be heterozygous like the parents? What percentage will have the dominant phenotype? ½ x ½ x ½ x ½ = 1/16 will be heterozygous ¾ x ¾ x ¾ x ¾ = 81/256 (I did this in my head….is this correct?)

  7. In rabbits, gray is dominant to white. A heterozygous rabbit is crossed with a homozygous dominant rabbit. What is the genotypic and phenotypic ratio? Phenotypic = all gray Genotypic: 1Gg : 1 GG G = gray, g = white

  8. In watermelons, green is dominant to striped and short is dominant to long. Cross a long and striped watermelon with a watermelon that is heterozygous for both traits. What is the phenotypic ratio? G = green g = striped S = short s = long Parents = ssgg x SsGg 1 short green : 1 short striped : 1 long green : 1 long striped

  9. Roan cattle are codominant. Cross a red cow and a white bull. What is the genotypic and phenotypic ratio of the F1 offspring? F2 offspring? • F1 • Genotypic ratio - All RW • Phenotypic ratio – all red and white (roan) • F2 • Phenotypic ratio – 1 red: 2 roan: 1 white • Genotypic ratio – 1 RR : 2RW : 1 WW

  10. For each of the following, state if each of the following is possible 1) A person with A blood having a kid with AB blood 2) A person with AB blood having a kid with B blood 3) A person with O blood having a kid with AB blood 4) A person with O blood having a kid with A blood 5) A person with A blood donating blood to someone with type AB blood 6) A person with A blood donating blood to someone with type O blood 1) Yes 2) Yes 3) No 4) Yes 5) Yes 6) No

  11. In chickens, black and white color are incompletely dominant. In a second gene that controls comb shape, rose is dominant to single. If a pure-breeding black chicken with a rose comb is crossed with a white chicken with a single comb, what fraction of the F2 offspring will be gray with single comb? Show the Punnett Square 1/8 will be gray with single comb

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