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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Question
10
A. What proportion of the female offspring will have curly hair?
B. What proportion of the male offspring will have straight hair?

Transcribed Image Text:The gene for curly/straight hair in guinea pigs is located on the X chromosome. The dominant "R" allele results in curly hair. The pedigree shows a guinea pig family with a
history of curly hair. Filled-in shapes indicate individuals who have curly hair.
I.
II.
III.
Expert Solution

Step 1
A pedigree analysis is a family tree or chart made of symbols and lines that represent a persons genetic family history.
In first generation all offspring are curly hair
female genotype - Xc Xc
male genotype - XY
Xc Xc XY
Xc | Xc | |
X | X c X | XXc |
Y | X c Y | X c Y |
All child are curly hair in 1st generation.
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