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Mutating the gene Transformer (tra) in Drosophila that is chromosomally XX leads to the development of only males. Which of the following statements about tra is FALSE? A heterozygous null tra mutation would produce XX males, and a constitutive tra mutation would produce XY females. O Even though sxl is present at levels to cause female development (because of the two X chromosomes), only males form because the SXL target is tra. In nonmutated fertilized eggs that are supposed to develop into females (XX), the two copies of SXL causes the expression of tra, which then leads to an alternative splicing pathway of the dsx gene that induces female development. If tra is not expressed or mutated, then males will form due to the alternative splicing of dsx that leads to male development.

Mutating the gene Transformer (tra) in Drosophila that is chromosomally XX leads to the development of only males. Which of the following statements about tra is FALSE? A heterozygous null tra mutation would produce XX males, and a constitutive tra mutation would produce XY females. O Even though sxl is present at levels to cause female development (because of the two X chromosomes), only males form because the SXL target is tra. In nonmutated fertilized eggs that are supposed to develop into females (XX), the two copies of SXL causes the expression of tra, which then leads to an alternative splicing pathway of the dsx gene that induces female development. If tra is not expressed or mutated, then males will form due to the alternative splicing of dsx that leads to male development.

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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QUESTION 10 Mutating the gene Transformer (tra) in Drosophila that is chromosomally XX leads to the development of only males. Which of the following statements about tra is FALSE? A heterozygous null tra mutation would produce XX males, and a constitutive tra mutation would produce XY females. Even though sxl is present at levels to cause female development (because of the two X chromosomes), only males form because the SXL target is tra. In nonmutated fertilized eggs that are supposed to develop into females (XX), the two copies of SXL causes the expression of tra, which then leads to an alternative splicing pathway of the dsx gene that induces female development. If tra is not expressed or mutated, then males will form due to the alternative splicing of dsx that leads to male development. O O O
Transcribed Image Text:QUESTION 10 Mutating the gene Transformer (tra) in Drosophila that is chromosomally XX leads to the development of only males. Which of the following statements about tra is FALSE? A heterozygous null tra mutation would produce XX males, and a constitutive tra mutation would produce XY females. Even though sxl is present at levels to cause female development (because of the two X chromosomes), only males form because the SXL target is tra. In nonmutated fertilized eggs that are supposed to develop into females (XX), the two copies of SXL causes the expression of tra, which then leads to an alternative splicing pathway of the dsx gene that induces female development. If tra is not expressed or mutated, then males will form due to the alternative splicing of dsx that leads to male development. O O O
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