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A planet is inhabited by creatures that reproduce with thesame hereditary patterns seen

Chapter 15, Problem 4

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QUESTION:

A planet is inhabited by creatures that reproduce with thesame hereditary patterns seen in humans. Three phenotypiccharacters are height (T = tall, t = dwarf), head appendages(A = antennae, a = no antennae), and nose morphology (S =upturned snout, s = downturned snout). Since the creaturesare not intelligent, Earth scientists are able to do some controlledbreeding experiments using various heterozygotes intestcrosses. For tall heterozygotes with antennae, the offspringare tall-antennae, 46; dwarf-antennae, 7; dwarf-no antennae,42; tall-no antennae, 5. For heterozygotes with antennae andan upturned snout, the offspring are antennae-upturned snout,47; antennae-downturned snout, 2; no antennae-downturnedsnout, 48; no antennae-upturned snout, 3. Calculate the recombinationfrequencies for both experiments.

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QUESTION:

A planet is inhabited by creatures that reproduce with thesame hereditary patterns seen in humans. Three phenotypiccharacters are height (T = tall, t = dwarf), head appendages(A = antennae, a = no antennae), and nose morphology (S =upturned snout, s = downturned snout). Since the creaturesare not intelligent, Earth scientists are able to do some controlledbreeding experiments using various heterozygotes intestcrosses. For tall heterozygotes with antennae, the offspringare tall-antennae, 46; dwarf-antennae, 7; dwarf-no antennae,42; tall-no antennae, 5. For heterozygotes with antennae andan upturned snout, the offspring are antennae-upturned snout,47; antennae-downturned snout, 2; no antennae-downturnedsnout, 48; no antennae-upturned snout, 3. Calculate the recombinationfrequencies for both experiments.

ANSWER:


Tall Heterozygotes with Antennae:

r = absolute value(46

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