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,...
Related questions
Question
Can you show the cross? Any explanation would be good
Transcribed Image Text:Geneticists have determined that the recombination frequency
between these two genes in cucumbers is 16%.
Warty, dull
fruit
Smooth, glossy
fruit
Testcross
T D
t
d
t
d
Gamete formation
Gamete formation
T D
t d
T d
t D
t d
Nonrecombinant Recombinant Nonrecombinant
gametes
Predicted 0.42 0.42
gametes
gametes
0.08 0.08
1.00
frequency
of gametes
Fertilization
Because the recombination
frequency is 16%, the total
proportion of recombinant
gametes is 0.16.
Predicted frequency
of progeny
Warty,
dull fruit
0.42 X1.00
= 0.42
T
D
d
Non-
recombinant
Smooth,
0.42 X1.00
= 0.42
progeny
glossy fruit
Warty,
glossy fruit
0.08 X1.00
= 0.08
Recombinant
Smooth,
dull fruit
0.08 X1.00
= 0.08
progeny
D
d
The predicted frequency of progeny
is obtained by multiplying the
frequencies of the gametes.
Pierce, Genetics: A Conceptual Approach, 7e © 2020
W. H. Freeman and Company
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