PART I-Calculation The Borogravian tiger woodlouse is a species of large invertebrate that lives primarily on slugs, snails and puppy dogs' tails. Unusually for a woodlouse, it has a fluffy coat, and the nature of this coat is controlled by three genes. The dominant alleles, F (fluff), C (colour) and T (tufts) and produce fluffy woodlice with black stripes and long tufty eyebrows. The recessive alleles (f, c and t) produce rough-coated woodlice with grey stripes and no tufts. In a three-point linkage analysis experiment, I carried out a test cross using a triply heterozygous tiger and a triple recessive partner. When the eggs hatched, I found that the resulting 120 offspring had the following phenotypes

PART I-Calculation The Borogravian tiger woodlouse is a species of large invertebrate that lives primarily on slugs, snails and puppy dogs' tails. Unusually for a woodlouse, it has a fluffy coat, and the nature of this coat is controlled by three genes. The dominant alleles, F (fluff), C (colour) and T (tufts) and produce fluffy woodlice with black stripes and long tufty eyebrows. The recessive alleles (f, c and t) produce rough-coated woodlice with grey stripes and no tufts. In a three-point linkage analysis experiment, I carried out a test cross using a triply heterozygous tiger and a triple recessive partner. When the eggs hatched, I found that the resulting 120 offspring had the following phenotypes

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter22: Speciation

Section: Chapter Questions

Problem 13TYK

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PARTI - Calculation
The Borogravian tiger woodlouse is a species of large invertebrate that lives
primarily on slugs, snails and puppy dogs' tails. Unusually for a woodlouse, it has a
fluffy coat, and the nature of this coat is controlled by three genes.
The dominant alleles, F (fluff), C (colour) and T (tufts) and produce fluffy woodlice
with black stripes and long tufty eyebrows. The recessive alleles (f, c and t) produce
rough-coated woodlice with grey stripes and no tufts.
In a three-point linkage analysis experiment, I carried out a test cross using a triply
heterozygous tiger and a triple recessive partner. When the eggs hatched, I found
that the resulting 120 offspring had the following phenotypes
1. Fluffy, black stripes, long tufts
2. Fluffy, black stripes, no tufts
3. Fluffy, grey stripes, long tufts
4. Fluffy, grey stripes, no tufts
5. Rough-coated, black stripes, long tufts
6. Rough-coated, black stripes, no tufts
7. Rough-coated, grey stripes, long tufts
8. Rough-coated, grey stripes, no tufts
Calculate and draw the genetic map for the genes F, C and T including
distances
(THE NUMBERS ARE SIMPLE SO A CALCULATOR SHOULD NOT BE
REQUIRED, MARKS WILL BE GIVEN FOR SHOWING YOUR WORKING AND
USING CORRECT UNITS)
T56 - 6
4
1
51
7
44
1

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