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22 June, 17:48

Part 2: Codominance - Predicting stripe color in lizard tails A certain species of lizard can have red stripes, yellow stripes, or red and oranges stripes. An RR lizard has red stripes, an YY lizard has orange stripes, and an RY lizard has red and orange stripes. A lizard with red stripes (RR) mates with a lizard with orange stripes (YY). 3. Create a Punnett square to show their offspring, the F1 generation. Punnett Square Parent R R Y RR Ry Y YY ry 4. What pattern do you notice in the genotypes of the F1 generation lizards? 5. What are the phenotypes of the F1 generation lizards?

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  1. 22 June, 18:30
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    In F1 generation all lizards are heterozygous RY, and will have red and orange stripes in their tails

    Explanation:

    If the cross is between RR and YY lizards, in a Punnett square we'll have RR vs YY

    Let's say YY is female and RR male

    Y Y

    R RY RY

    R RY RY

    All lizards will be RY, coding for red and orange colours in their tails (phenotype) in F1 generation
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