A young boy is color blind. His one brother and five sisters are not. The boy has three maternal uncles and four maternal aunts. None of his uncles’ children or grandchildren is colorblind. One of the maternal aunts married a colorblind man, and half of her children, both male and female, are colorblind. The other aunts married man who have normal color vision. All their daughters have normal vision, but half of their sons are color blind. a) is either of the boy’s parents colorblind? b) which of the boy’s four grandparents transmitted the gene for colorblindness?
A young boy is color blind. His one brother and five sisters are not. The boy has three maternal uncles and four maternal aunts. None of his uncles’ children or grandchildren is colorblind. One of the maternal aunts married a colorblind man, and half of her children, both male and female, are colorblind. The other aunts married man who have normal color vision. All their daughters have normal vision, but half of their sons are color blind. a) is either of the boy’s parents colorblind? b) which of the boy’s four grandparents transmitted the gene for colorblindness?
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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A young boy is color blind. His one brother and five sisters are not. The boy has three maternal uncles and four maternal aunts. None of his uncles’ children or grandchildren is colorblind. One of the maternal aunts married a colorblind man, and half of her children, both male and female, are colorblind. The other aunts married man who have normal color vision. All their daughters have normal vision, but half of their sons are color blind.
a) is either of the boy’s parents colorblind?
b) which of the boy’s four grandparents transmitted the gene for colorblindness?
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Color blindness, also known as "color deficiency" is an X-linked recessive genetic disorder in which a person is not able to see colors in a normal manner.
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