Dr. P was using Drosophila to follow the inheritance patterns of two traits: body shape and wing size. Dr.P began her experiment by crossing wild type, homozygous dominant, males with double mutant, homozygous recessive, females. She then performed a testcross by mating F1 generation males with double mutant, homozygous recessive, females and observed the phenotypes of the F, generation. Shorthand of the different alleles is annotated as follows: Wild type round body shape allele = b Wild type large wing size =w* Mutant rectangle body shape allele = b Mutant small wing size = w A) Complete the table by indicating the genotypes for each generation of male and female flies. Male Genotype Female Genotype P generation F, generation testcross When Dr.P characterized and counted the F2 phenotypes, she determined the following: Round-large Rectangle-small 332 flies Round-small Rectangle-large 357 flies Number of flies 344 flies 360 flies B) Using the data above, would you be surprised (yes or no) to learn that the body shape and wing size alleles are located on the same chromosome? Explain why or why not. C) Given your response in B) would you expect the distance between chromosomal loci of body shape and wing size to be large or small? Justify your answer.
Dr. P was using Drosophila to follow the inheritance patterns of two traits: body shape and wing size. Dr.P began her experiment by crossing wild type, homozygous dominant, males with double mutant, homozygous recessive, females. She then performed a testcross by mating F1 generation males with double mutant, homozygous recessive, females and observed the phenotypes of the F, generation. Shorthand of the different alleles is annotated as follows: Wild type round body shape allele = b Wild type large wing size =w* Mutant rectangle body shape allele = b Mutant small wing size = w A) Complete the table by indicating the genotypes for each generation of male and female flies. Male Genotype Female Genotype P generation F, generation testcross When Dr.P characterized and counted the F2 phenotypes, she determined the following: Round-large Rectangle-small 332 flies Round-small Rectangle-large 357 flies Number of flies 344 flies 360 flies B) Using the data above, would you be surprised (yes or no) to learn that the body shape and wing size alleles are located on the same chromosome? Explain why or why not. C) Given your response in B) would you expect the distance between chromosomal loci of body shape and wing size to be large or small? Justify your answer.
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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Transcribed Image Text:Dr. P was using Drosophila to follow the inheritance patterns of two traits: body shape and wing size. Dr.P began her experiment by
crossing wild type, homozygous dominant, males with double mutant, homozygous recessive, females. She then performed a testcross
by mating Fi generation males with double mutant, homozygous recessive, females and observed the phenotypes of the F2 generation.
Shorthand of the different alleles is annotated as follows:
Wild type round body shape allele = b*
Wild type large wing size =w*
Mutant rectangle body shape allele = b
Mutant small wing size = w
A) Complete the table by indicating the genotypes for each generation of male and female flies.
Male Genotype
Female Genotype
P generation
F, generation testcross
When Dr.P characterized and counted the F2 phenotypes, she determined the following:
Round-large
Rectangle-small
332 flies
Round-small
Rectangle-large
357 flies
Number of flies
344 flies
360 flies
B) Using the data above, would you be surprised (yes or no) to learn that the body shape and wing size alleles are located on the same
chromosome? Explain why or why not.
C) Given your response in B) would you expect the distance between chromosomal loci of body shape and wing size to be large or
small? Justify your answer.
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