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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Can you help with d?
D. Actual configuration of the parental chromosomes in the trihybrid plant is (use slash notation). _______
Transcribed Image Text:I. DETERMINING
GENE ORDER
We want to map the distance between genes E (tall height), B (Blue flower color), and G (thick stalk). Each
gene has a recessive allele (e= short, b-white and g=thin).
a) Your testcross genotypes (use slash notation) will be
x (tester)
Note: The actual configuration of the trihybrid will be deduced as part of the process.
Table 1. Test-cross progeny phenotypes #s:
1) Tall, white, thin: 8
4) Tall, blue, thin: 120
7) Short, white, thin: 147
b) Based on these results, are the genes linked or not?
2) Tall, white, thick: 498
5) Tall, blue, thick: 149
8) Short, blue, thin: 500
3) Short, white, thick: 118
6) Short, blue, thick: 7
c) Based on the results above, the parental progeny can be observed in the phenotypes #s: 2
and their corresponding genotypes (use slash notation) are: _EbG/ebg__and
d) Actual configuration of the parental chromosomes in the trihybrid plant is (use slash notation):
and their corresponding genotypes
e) The double crossover progeny phenotypes #s are: _1_ and
(use slash notation) are:
and
and
Ebg/ebg_
f) Compare the double crossover classes with the parental classes. Based on this comparison, the actual
gene order is:
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