Red-green color blindness in humans is due to an X- linked recessive gene.Both John and Cathy have normal color vision. Cathy is adopted, and knows nothing about her biological parents. After 10 years ofmarriage to John, Cathy has given birth to a color-blind daughter and a color-blind son. John filed for divorce, claiming that he is not thefather of at least one of the children. Is John justified in his claim of nonpaternity?Yes. He cannot be the father of Cathy's son.b. Yes, He cannot be the father of either child.O c. No. He is the father of both children.d. Yes. He cannot be the father of Cathy's daughter.Next pagegeems: X Inactivation, Nondisjunction,Quiz 3 Sex-linked Traits>Jump to...PedigreeFEB17MacBook Air80DIIDDF1F2F3F4F5F6F7F8F9F10@#3$4&*

Red-green color blindness is the most common variety of color deficiency in humans. It happens to…

Answered: Red-green color blindness in humans 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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Red-green color blindness in humans is due to an X- linked recessive gene.
Both John and Cathy have normal color vision. Cathy is adopted, and knows nothing about her biological parents. After 10 years of
marriage to John, Cathy has given birth to a color-blind daughter and a color-blind son. John filed for divorce, claiming that he is not the
father of at least one of the children. Is John justified in his claim of nonpaternity?
Yes. He cannot be the father of Cathy's son.
b. Yes, He cannot be the father of either child.
O c. No. He is the father of both children.
d. Yes. He cannot be the father of Cathy's daughter.
Next page
ge
ems: X Inactivation, Nondisjunction,
Quiz 3 Sex-linked Traits>
Jump to...
Pedigree
FEB
17
MacBook Air
80
DII
DD
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
@
#3
$4
&
*

Expert Solution

Step 1

Red-green color blindness is the most common variety of color deficiency in humans. It happens to people who can’t see shades of red and green the same way as people with normal color perception do
X-linked recessive inheritance refers to genetic conditions associated with mutations in genes on the X chromosome. A male carrying such a mutation will be affected, because he carries only one X chromosome.
A female carrying a mutation in one gene, with a normal gene on the other X chromosome, is generally unaffected
Males are affected more often than females, because the gene is located on the X chromosome.

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