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Polygenic Traits Worksheet - Activity Polygenic Traits Use...

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Activity: Polygenic Traits Use the following information to answer the next question Regarding mice genes C /c= pigment production B/b= coat color * These genes segregate independently C = pigment production c= no pigment produced (albino) B=reacts with pigment to produce black coat b= reacts with pigment to produce brown coat Perform the following cross: ccBB x C cBb and provide a complete genetic analysis. ccBB ( white coat – albino) x C cBb (black coat) Gametes: (cB) ( C B, C b, cB, cb) Offspring #: 1 gamete x 4 gametes = 4 offspring types G: P: 25% ( ¼) C cBB 25% ( ¼) C cBb 25% ( ¼) ccBB 25% ( ¼) ccBb 50% ( 2/4) Black Coat 50% ( 2/4) White Coat (Albino) Genotypic Ratio 1:1:1:1 Phenotypic Ratio: 2:2 ccBB x C cBb cB C B C cBB C b C cBb cB ccBB cb ccBb
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Use the following information to answer the next question In drosophila, eye color is determined by two different genes located on different chromosomes. A recessive gene (b), found on an autosomal chromosome, produces brown eye color.
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