Answered: n tomato plants, tall vine (D) is…

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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In tomato plants, tall vine (D) is dominant over dwarf vine (d) and round fruit (O) 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:

i) 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?

(ii) Calculate the recombination frequency between the genes D/d and O/o in tomatoes.

(iii) Draw a chromosome map for these genes. (Use underscore (_) to draw the line for the map)

PLANT 1
PLANT 2
Tall, round x dwarf, oval-shape
Phenotypic classes
Tall, round
Dwarf, oval
Tall, oval
Dwarf, round
Total
Tall, round x dwarf, oval-shape
Phenotypic classes
Tall, round
Dwarf, oval
Tall, oval
Dwarf, round
Total
Numbers
Numbers
37
161
35
167
158
34
170
38
400
400

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