34 m,u. Se a22mu ->CUE iamu e In Dropsophila, sepia eyes (se), curled wings (cu), and ebony body (e) are found, in this order, on chromosome 3. Sepia is 22 map units from curled, which is 12 map units from ebony. A true-breeding female with sepia eyes and ebony body is crossed to a true- breeding male who has curled wings. The resulting F1 progeny from this cross are all wild type. An F1 female is test crossed to a male expressing all three traits. Assuming a 9. coefficient of coincidence of 1: a. What proportion of the F2 progeny will express only the sepia trait?
34 m,u. Se a22mu ->CUE iamu e In Dropsophila, sepia eyes (se), curled wings (cu), and ebony body (e) are found, in this order, on chromosome 3. Sepia is 22 map units from curled, which is 12 map units from ebony. A true-breeding female with sepia eyes and ebony body is crossed to a true- breeding male who has curled wings. The resulting F1 progeny from this cross are all wild type. An F1 female is test crossed to a male expressing all three traits. Assuming a 9. coefficient of coincidence of 1: a. What proportion of the F2 progeny will express only the sepia trait?
Human Anatomy & Physiology (11th Edition)
11th Edition
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
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Transcribed Image Text:-34m,u,
+-
See 22mu ->CUE 12mue
In Dropsophila, sepia eyes (se), curled wings (cu), and ebony body (e) are found,
in this order, on chromosome 3. Sepia is 22 map units from curled, which is 12 map units
from ebony. A true-breeding female with sepia eyes and ebony body is crossed to a true-
breeding male who has curled wings. The resulting F1 progeny from this cross are all wild
type. An F1 female is test crossed to a male expressing all three traits. Assuming a
9.
coefficient of coincidence of 1:
a. What proportion of the F2 progeny will express only the sepia trait?
b. If there are 1000 total progeny, what number will express curved only?
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