Why is there a difference in the proportionate number of plants in each phenotypic class of the offspring resulting from test crosses of plants 1 and 2? Calculate the recombination frequency between the genes D/d and O/o in tomatoes. Draw a chromosome map for these genes. (Use underscore () to draw the line for the map)
Why is there a difference in the proportionate number of plants in each phenotypic class of the offspring resulting from test crosses of plants 1 and 2? Calculate the recombination frequency between the genes D/d and O/o in tomatoes. Draw a chromosome map for these genes. (Use underscore () to draw the line for the map)
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:QUEJTIUIv 4
In tomato plants, tall vine (D) is dominant over dwarf vine (d) and round fruit (0) is dominant over oval-shaped fruit (o).
Two tall, round-fruit shape plants (plants 1 and 2) are crossed with dwarf, oval-shape fruit plants. The results are as follows:
PLANT 1
PLANT 2
Tall, round x dwarf, oval-shape
Phenotypic classes
Tall, round
Dwarf, oval
Tall, oval
Dwarf, round
Tall, round x dwarf, oval-shape
Phenotypic classes
Numbers
Numbers
81
Tall, round
21
Dwarf, oval
Tall, oval
Dwarf, round
79
19
22
77
18
83
Total
200
Total
200
a. Why is there a difference in the proportionate number of plants in each phenotypic class of the offspring resulting from test crosses of plants 1 and 2?
b. Calculate the recombination frequency between the genes D/d and O/o in tomatoes.
c. Draw a chromosome map for these genes.
(Use underscore (_) to draw the line for the map)
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