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Using the data listed above, construct a gene map between the genes R,S, and F. Calculate map unit values between all genes, and draw or create a map diagram of the relationship between the genes.

Using the data listed above, construct a gene map between the genes R,S, and F. Calculate map unit values between all genes, and draw or create a map diagram of the relationship between the genes.

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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You are a plant geneticist at the Tomato Genetics Resource Center at the University of California-Davis (yes, there really is such a place). You are studying three genes, which you know are on chromosome 3 of the tomato: R, S, and F. Each gene has two alleles: R causes red flesh; r causes yellow flesh. S causes smooth skin; s causes fuzzy skin. F causes round shape; f causes oblate shape. You mate a tomato plant with red flesh, smooth skin, and oblate shape with a tomato with yellow flesh, fuzzy skin, and round shape. All of the F₁ offspring have red flesh, smooth skin, and round shape. You conduct a test cross and mate F₁ plants with plants possessing the recessive traits (yellow flesh, fuzzy skin, and oblate shape). You count and classify the following offspring of the test cross: red, smooth, oblate 382 yellow, fuzzy, round 379 red, fuzzy, oblate 69 yellow, smooth, round 67 red, fuzzy, round 48 yellow, smooth, oblate 44 yellow, fuzzy, oblate 6 red, smooth, round. 5 Using the data listed above, construct a gene map between the genes R,S, and F. Calculate map unit values between all genes, and draw or create a map diagram of the relationship between the genes.
Transcribed Image Text:You are a plant geneticist at the Tomato Genetics Resource Center at the University of California-Davis (yes, there really is such a place). You are studying three genes, which you know are on chromosome 3 of the tomato: R, S, and F. Each gene has two alleles: R causes red flesh; r causes yellow flesh. S causes smooth skin; s causes fuzzy skin. F causes round shape; f causes oblate shape. You mate a tomato plant with red flesh, smooth skin, and oblate shape with a tomato with yellow flesh, fuzzy skin, and round shape. All of the F₁ offspring have red flesh, smooth skin, and round shape. You conduct a test cross and mate F₁ plants with plants possessing the recessive traits (yellow flesh, fuzzy skin, and oblate shape). You count and classify the following offspring of the test cross: red, smooth, oblate 382 yellow, fuzzy, round 379 red, fuzzy, oblate 69 yellow, smooth, round 67 red, fuzzy, round 48 yellow, smooth, oblate 44 yellow, fuzzy, oblate 6 red, smooth, round. 5 Using the data listed above, construct a gene map between the genes R,S, and F. Calculate map unit values between all genes, and draw or create a map diagram of the relationship between the genes.
Each of the following questions refer to the data set and linkage map from problem 1: a. Explain why, in general, the map distance between the two most distant genes is less than the sum of the distances between the closer pairs of genes. b. According to your map, which classes correspond to double-crossover events? c. If you have not so already, calculate the corrected map distance between the two most distant genes. d. Calculate the predicted number of double-crossover events. How does this compare to the observed number?
Transcribed Image Text:Each of the following questions refer to the data set and linkage map from problem 1: a. Explain why, in general, the map distance between the two most distant genes is less than the sum of the distances between the closer pairs of genes. b. According to your map, which classes correspond to double-crossover events? c. If you have not so already, calculate the corrected map distance between the two most distant genes. d. Calculate the predicted number of double-crossover events. How does this compare to the observed number?
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