In humans, as well as with many other animals, sex is determined by special sex chromosomes. An individualcontaining two X chromosomes is a female, while an individual possessing an X and Y chromosome is a male. hesex chromosomes bear alleles for traits. Sex linkage applies to genes that are located on the sex chromosomes.These genes are considered sex-linked because their expression and inheritance patterns differ between males andfemales. The genes present on the X chromosome are said to be X linked. Many more genes are present on the Xchromosome than found on the Y chromosome. Nonetheless, those genes found on the Y chromosome are said to beY linked. The Y chromosome is smaller than its homologue, the X chromosome. Consequently, most of the locipresent on the X chromosome are absent on the Y chromosome.1. In humans, hemophilia is a sex linked trait. Females can be normal, carriers, or have the disease. Males will havethe disease or not (but they won't be ever carriers)XH XH = female, normalXH Xh = female, carrier%3DXh Xh = female, hemophilicXH Y = male, normal%3DXh Y = male, hemophilic%3Da) Show the cross of a man who has hemophilia with a woman who is a carrier. 2. A woman who is a carrier for hemophilia has children with a normal man. Show the cross.Carrier(xux)a) What is the probability that their children will have hemophilia?b) What sex will a child in the family with hemophilia be?3. A woman who has hemophilia marries a normal man. How many of their children will have hemophilia andwhat is their sex?hromocomo but it is absent

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hY = male, hemophilic %3D a) Show the cross of a man who has hemophilia with a woman who is a carrier.

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

In humans, as well as with many other animals, sex is determined by special sex chromosomes. An individual
containing two X chromosomes is a female, while an individual possessing an X and Y chromosome is a male. he
sex chromosomes bear alleles for traits. Sex linkage applies to genes that are located on the sex chromosomes.
These genes are considered sex-linked because their expression and inheritance patterns differ between males and
females. The genes present on the X chromosome are said to be X linked. Many more genes are present on the X
chromosome than found on the Y chromosome. Nonetheless, those genes found on the Y chromosome are said to be
Y linked. The Y chromosome is smaller than its homologue, the X chromosome. Consequently, most of the loci
present on the X chromosome are absent on the Y chromosome.
1. In humans, hemophilia is a sex linked trait. Females can be normal, carriers, or have the disease. Males will have
the disease or not (but they won't be ever carriers)
XH XH = female, normal
XH Xh = female, carrier
%3D
Xh Xh = female, hemophilic
XH Y = male, normal
%3D
Xh Y = male, hemophilic
%3D
a) Show the cross of a man who has hemophilia with a woman who is a carrier.

2. A woman who is a carrier for hemophilia has children with a normal man. Show the cross.
Carrier
(xux)
a) What is the probability that their children will have hemophilia?
b) What sex will a child in the family with hemophilia be?
3. A woman who has hemophilia marries a normal man. How many of their children will have hemophilia and
what is their sex?
hromocomo but it is absent

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