Three linked loci are evaluated to determine the recombination frequency of the loci. To set up the test cross, an individual that is true breeding dominant for all three phenotypes is crossed with an individual that is true breeding recessive for all three phenotypes. F1 offspring are crossed with individuals that are recessive for all phenotypes. The phenotypic results are shown in the table below. PhenotypeNumber of OffspringDominant 1, Dominant 2, Dominant 3322Dominant 1, Dominant 2, Recessive 382Recessive 1, Dominant 2, Recessive 35Dominant 1, Recessive 2, Dominant 32Recessive 1, Dominant 2, Dominant 328Recessive 1, Recessive 2, Dominant 389Recessive 1, Recessive 2, Recessive 3312Dominant 1, Recessive 2, Recessive 325 1. Which two phenotypes are parental?2. What is the map distance between locus 1 and locus 2?3. What is the map distance between locus 1 and locus 3?4. What is the map distance between locus 2 and locus 3?5. Sketch a chromosome that maps the three loci based on your map distance calculations.

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Description: Three linked loci are evaluated to determine the recombination frequency of the loci. To set up the test cross, an individual that is true breeding dominant for all three phenotypes is crossed with an individual that is true breeding recessive for al

This is an example of a three-point crossover. Where 3 loci are involved. Each gene has 2 alleles,…

Answered: Three linked loci are evaluated to…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

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Three linked loci are evaluated to determine the recombination frequency of the loci. To set up the test cross, an individual that is true breeding dominant for all three phenotypes is crossed with an individual that is true breeding recessive for all three phenotypes. F₁ offspring are crossed with individuals that are recessive for all phenotypes. The phenotypic results are shown in the table below.

Phenotype	Number of Offspring
Dominant 1, Dominant 2, Dominant 3	322
Dominant 1, Dominant 2, Recessive 3	82
Recessive 1, Dominant 2, Recessive 3	5
Dominant 1, Recessive 2, Dominant 3	2
Recessive 1, Dominant 2, Dominant 3	28
Recessive 1, Recessive 2, Dominant 3	89
Recessive 1, Recessive 2, Recessive 3	312
Dominant 1, Recessive 2, Recessive 3	25

1. Which two phenotypes are parental?

2. What is the map distance between locus 1 and locus 2?

3. What is the map distance between locus 1 and locus 3?

4. What is the map distance between locus 2 and locus 3?

5. Sketch a chromosome that maps the three loci based on your map distance calculations.

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