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2. In a certain rose variety, thorny stems ( 1) are recessive to smooth stems (T) and having white flowers () is recessive to having red flowers (R). The genes for stem thorns and flower color are located on the same chromosome. A rose homozygous for thorny stems and red flowers is crossed with a plant homozygous for smooth stems and white flowers. The F1 progeny are then crossed with plants that have thorny stems and white flowers (a testcross) to produce F2 progeny. The F2 progeny of this testcross are: thorny stems, red flowers thorny stems, white flowers smooth stems, red flowers smooth stems, white flowers 256 28 31 249 2a. What phenotypic proportions would be expected if the genes for thorny stems and flower color were located on different chromosomes? 2b. What is the percent recombination between the genes for thorny stems and flower color?

2. In a certain rose variety, thorny stems ( 1) are recessive to smooth stems (T) and having white flowers () is recessive to having red flowers (R). The genes for stem thorns and flower color are located on the same chromosome. A rose homozygous for thorny stems and red flowers is crossed with a plant homozygous for smooth stems and white flowers. The F1 progeny are then crossed with plants that have thorny stems and white flowers (a testcross) to produce F2 progeny. The F2 progeny of this testcross are: thorny stems, red flowers thorny stems, white flowers smooth stems, red flowers smooth stems, white flowers 256 28 31 249 2a. What phenotypic proportions would be expected if the genes for thorny stems and flower color were located on different chromosomes? 2b. What is the percent recombination between the genes for thorny stems and flower color?

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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2. In a certain rose variety, thorny stems ( t) are recessive to smooth stems (T) and having white flowers () is recessive to having red flowers (R). The genes for stem thorns and flower color are located on the same chromosome. A rose homozygous for thorny stems and red flowers is crossed with a plant homozygous for smooth stems and white flowers. The F1 progeny are then crossed with plants that have thorny stems and white flowers (a testcross) to produce F2 progeny. The F2 progeny of this testcross are: thorny stems, red flowers thorny stems, white flowers smooth stems, red flowers smooth stems, white flowers 256 28 31 249 2a. What phenotypic proportions would be expected if the genes for thorny stems and flower color were located on different chromosomes? 2b. What is the percent recombination between the genes for thorny stems and flower color? 2c. Is the F1 heterozygote in coupling or repulsion?
Transcribed Image Text:2. In a certain rose variety, thorny stems ( t) are recessive to smooth stems (T) and having white flowers () is recessive to having red flowers (R). The genes for stem thorns and flower color are located on the same chromosome. A rose homozygous for thorny stems and red flowers is crossed with a plant homozygous for smooth stems and white flowers. The F1 progeny are then crossed with plants that have thorny stems and white flowers (a testcross) to produce F2 progeny. The F2 progeny of this testcross are: thorny stems, red flowers thorny stems, white flowers smooth stems, red flowers smooth stems, white flowers 256 28 31 249 2a. What phenotypic proportions would be expected if the genes for thorny stems and flower color were located on different chromosomes? 2b. What is the percent recombination between the genes for thorny stems and flower color? 2c. Is the F1 heterozygote in coupling or repulsion?
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