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*Fine spines (s), smooth fruit (t), and uniform fruit color (u) are recessive traits in A cucumber that is cucumbers whose genes are linked on the same chromosome. heterozygous for all three traits is used in a testcross, and the following progeny are produced: Progeny Phenotype SUT sut SUT sut SUt sUt SUT Sut Number of Progeny. 2 70 21 4 82 21 13 17 230 a. Determine the order of the genes on the chromosome. b. Calculate the map distance between the genes. c. Determine the coefficient of coincidence and interference.

*Fine spines (s), smooth fruit (t), and uniform fruit color (u) are recessive traits in A cucumber that is cucumbers whose genes are linked on the same chromosome. heterozygous for all three traits is used in a testcross, and the following progeny are produced: Progeny Phenotype SUT sut SUT sut SUt sUt SUT Sut Number of Progeny. 2 70 21 4 82 21 13 17 230 a. Determine the order of the genes on the chromosome. b. Calculate the map distance between the genes. c. Determine the coefficient of coincidence and interference.

Human Anatomy & Physiology (11th Edition)
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
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Title: Genetic Linkage in Cucumbers - Phenotypic Analysis** Fine spines (s), smooth fruit (t), and uniform fruit color (u) are recessive traits in cucumbers whose genes are linked on the same chromosome. A cucumber that is heterozygous for all three traits is used in a test cross, and the following progeny are produced: | Progeny Phenotype | Number of Progeny | |--------------------|-------------------| | S U T | 2 | | s u T | 70 | | S u t | 21 | | s u t | 4 | | S U t | 82 | | s U T | 21 | | s U t | 13 | | S u T | 17 | Total: 230 progeny **Questions to Explore:** a. **Determine the Order of the Genes on the Chromosome.** b. **Calculate the Map Distance Between the Genes.** c. **Determine the Coefficient of Coincidence and Interference.** d. **List the Alleles Found on the Chromosome of the Homozygous Parents of the Heterozygous Plant Used in the Test Cross.** This data is crucial for understanding the genetic linkage and mapping of traits in cucumbers, which can be applied to broader genetic studies.
Transcribed Image Text:**Title: Genetic Linkage in Cucumbers - Phenotypic Analysis** Fine spines (s), smooth fruit (t), and uniform fruit color (u) are recessive traits in cucumbers whose genes are linked on the same chromosome. A cucumber that is heterozygous for all three traits is used in a test cross, and the following progeny are produced: | Progeny Phenotype | Number of Progeny | |--------------------|-------------------| | S U T | 2 | | s u T | 70 | | S u t | 21 | | s u t | 4 | | S U t | 82 | | s U T | 21 | | s U t | 13 | | S u T | 17 | Total: 230 progeny **Questions to Explore:** a. **Determine the Order of the Genes on the Chromosome.** b. **Calculate the Map Distance Between the Genes.** c. **Determine the Coefficient of Coincidence and Interference.** d. **List the Alleles Found on the Chromosome of the Homozygous Parents of the Heterozygous Plant Used in the Test Cross.** This data is crucial for understanding the genetic linkage and mapping of traits in cucumbers, which can be applied to broader genetic studies.
Expert Solution
Step 1: Introduction


Introduction : 

  • When genes or alleles are linked they tend to present in the same chromosome and be in more numbers. 
  • As compared to the linked recessive alleles the the recombinant frequency is less in numbers. 
  • The linked genes present in larger number called parental combination.
  • In the above question the three point test cross over is given.
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