Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 40.3, Problem 2R
Summary Introduction
To review:
The defect, due to which a person having XY genotype have a
Introduction:
Sex determination is a biological process, by which the sex of offspring is determined. The presence of XX chromosomes in the fetus of a human develops into a female while a fetus carrying XY chromosomes develop into a male.
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how is it possible for a person who inherited XY gene to have female phenotype?
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Life: The Science of Biology
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- An individual that is genetically male develops as a female. Is this individual more or less likely to express an X-linked recessive disorder than an average female?arrow_forwardExplain why a female cannot have XXY syndrome and a male cannot have XO syndrome.arrow_forwardWhat is an individual with a homozygous genotype?arrow_forward
- Describe two mechanisms for causing uniparental disomy.arrow_forwardWhat is the probability that a carrier wom en will transmit an abnomal X-linked gene to her son? What is the probability that a carrier wom en will transmit an abnomal X-linked gene to her 3 sons? What is the probability that a women carrying an abnormal X-linked gene has two sons affected an one unaffected?arrow_forwardA color-blind man marries a woman with normal vision whose father was color-blind. Remember that color-blindness is an X-linked recessive trait. Hint: see figure 12.7 in book. A) What is the probability that their first child will be a color-blind daughter? B) What is the probability that their first son will be color-blind?arrow_forward
- How is it that genetic abnormalities that include an extra Y chromosome do not have a severe phenotype?arrow_forwardWhat causes incomplete dominance?arrow_forwardA human disease known as vitamin D–resistant rickets isinherited as an X-linked dominant trait. If a male with thedisease produces children with a female who does not have thedisease, what is the expected ratio of affected and unaffectedoffspring?arrow_forward
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