Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 4, Problem 15QP
Analysis of X-Linked Dominant and Recessive Traits
The X and Y chromosomes are structurally and genetically distinct. However, they do pair during meiosis at a small region near the tips of their short arms, indicating that the chromosomes are homologous in this region. If a gene lies in this region, will its pattern of transmission be more like that of a sex-linked gene or an autosomal gene? Why?
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Diploid Number of chromosomes, Sex Chromosomes, (+/- whole) Chromosome (+/- partial)
e.g. 47, XY, +14 = male with trisomy of chromosome 14
e.g. 46, XX, 1q+ = female with a partial increase to the length of the long arm of chromosome 1
(partial increases or decreases to a single chromosome still have the same diploid number)
What is the notation for the following case
A boy having Down syndrome
Within the blank cells, draw the phases of meiosis using 3 chromosome pairs.
Thank you
Nondisjunction which can affect sex chromosomes as well as autosomal chromosomes as a common cause of genetic disorders. Use the space provided to illustrate the process of nondisjunction with the end result being that one cell exhibits in the monopsony me while other one exhibits trisomy. Hint: a sperm will fertilize the egg and add it’s chromosome in the last step)
Chapter 4 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 4.3 - Does a pedigree drawn from the available...Ch. 4.3 - Prob. 2EGCh. 4.7 - Did the fact that Prince Albert and Queen Victoria...Ch. 4.7 - Which members of the pedigree could have been...Ch. 4 - Pedigree analysis is a fundamental tool for...Ch. 4 - Pedigree analysis is a fundamental tool for...Ch. 4 - Pedigree analysis is a fundamental tool for...Ch. 4 - Pedigree Analysis Is a Basic Method in Human...Ch. 4 - Pedigree Analysis Is a Basic Method in Human...Ch. 4 - Pedigree Analysis Is a Basic Method in Human...
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- Analysis of X-Linked Dominant and Recessive Traits As a genetic counselor investigating a genetic disorder in a family, you are able to collect a four-generation pedigree that details the inheritance of the disorder in question. Analyze the information in the pedigree to determine whether the trait is inherited as: a. autosomal dominant b. autosomal recessive c. X-linked dominant d. X-linked recessive e. Y-linkedarrow_forwardVariations in Chromosome NumberAneuploidy Describe the process of nondisjunction and explain when it takes place during cell division.arrow_forwardIncluding the sex chromosomes, the chromosome number of a normal human cell is and the chromosome number of this Hela cell is - (Hint: Chromosome number is different from total chromosome count.) It appears that this Hela cell has extra copies of chromosome 16. Henrietta Lacks was female, so, naturally, all the cells from her derived cancerous cell line have chromosomes. This HeLa cell, interestingly, has copies of its sex chromosomes. What sex is the normal human karyotype displayed here? O Male O Femalearrow_forward
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