Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 6, Problem 22QP
Identify the type of chromosomal aberration described in each of the following cases:
- a. loss of a chromosome segment
- b. extra copies of a chromosome segment
- c. reversal in the order of a chromosome segment
- d. movement of a chromosome segment to another, nonhomologous chromosome
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Identify the type of chromosomal aberration described in each of the following cases and provide and example.
loss of a chromosome segment
extra copies of a chromosome segment
reversal in the order of a chromosome segment
movement of a chromosome segment to another, non homologous chromosome
what is the significance of chromosomal aberration?
what are the different types of chromosomal abberations based on the structure and number of chromosomes? give examples for each.
what environmental factors may increase in the incidence of chromosomal aberrations?
Name the disorder with the following chromosome complement.(i) 22 pairs of autosomes + X X Y(ii) 22 pairs of autosomes + 21st chromosome + XY
Chapter 6 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 6 - Genetics in Practice case studies are...Ch. 6 - Genetics in Practice case studies are...Ch. 6 - Analyzing Karyotypes 1. Originally, karyotypic...Ch. 6 - Given the karyotype shown at right, is this a male...Ch. 6 - A colleague e-mails you saying that she has...Ch. 6 - What are the two most commonly used methods of...Ch. 6 - Prob. 5QPCh. 6 - Discuss the following sets of terms: a. trisomy...Ch. 6 - What chromosomal abnormality can result from...Ch. 6 - Tetraploidy may result from: a. lack of...
Ch. 6 - A cytology student believes he has identified an...Ch. 6 - An individual is found to have some tetraploid...Ch. 6 - A spermatogonial cell undergoes mitosis before...Ch. 6 - A teratogen is an agent that produces nongenetic...Ch. 6 - As a physician, you deliver a baby with protruding...Ch. 6 - Variations in Chromosome NumberAneuploidy Describe...Ch. 6 - A woman gives birth to monozygotic twins. One boy...Ch. 6 - Assume that a meiotic-nondisjunction event causes...Ch. 6 - Prob. 17QPCh. 6 - What is the genetic basis and phenotype for each...Ch. 6 - The majority of nondisjunction events leading to...Ch. 6 - Prob. 20QPCh. 6 - If all the nondisjunction events leading to Turner...Ch. 6 - Identify the type of chromosomal aberration...Ch. 6 - Describe the chromosomal alterations and phenotype...Ch. 6 - A geneticist discovers that a girl with Down...Ch. 6 - Albinism is caused by an autosomal recessive...Ch. 6 - Fragile-X syndrome causes the most common form of...
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- Explain two ways that a chromosomal rearrangement can cause a position effect.arrow_forwardDiscuss the mechanisms that lead to erroneous chromosome duplication, mention how they effect the development of Down’s syndrome.arrow_forwardExplain the reason why a dicentric chromosome is unstable.arrow_forward
- B. A woman is a carrier of a Robertsonian translocation between chromosomes 18 and 21. (i) Her chromosome set with respect to chromosomes 18 and 21 would consist of which specific chromosomes. Please draw a DIAGRAM illustrating these chromosomes as they would appear in their unreplicated state, clearly labeling the chromosomes and the chromosome arms present. (ii) If this woman were to have a child with a man who possess a completely normal set of chromosomes, there are six different possible outcomes with respect to the combinations of chromosomes 18, 21, and Robertsonian translocation chromosome that could be present in their offspring. Please indicate the TYPES and NUMBERS of chromosomes of each type present in their potential offspring. You may label the chromosomes as follows: 18 (for chromosome 18), 21 (for chromosome 21) or 18/21 (for the Robertsonian translocation chromosome). Also, please indicate the specific genetic abnormality (if any) that would be present in…arrow_forwardList the diagnostic features (genetic or cytological) that are used to identify these chromosomal alterations:a. Deletionsb. Duplicationsarrow_forwardComplete the table: Chromosomal Abnormalities Name of Abnormality Number of autosomes and sex chromosomes Classification of abnormality Affected Chromosome /number Description Metafemale syndrome Numerical abnormality Sexual aneuploidy 47 Chromosome x Wolf-hirschhorn syndrome Structural abnormality Deletion 46 Chromosome 5 Structural abnormality Deletion Chromosome 11 Pallister-Killian syndrome Chromosome 12 47 Chromosome 13 Isodicentic 15 syndrome 47 Numerical abnormality autosomal aneuploidy 47 Chromosome 18 Cat eye syndrome Chromosome 22 Down syndrome 47 With oblique eyes Numerical abnormality Sexual aneuploid Also called as criminal syndrome Turner syndrome 45 45 Numerical abnormality sexual aneuploid Can not survive long…arrow_forward
- Describe a chromosomal deletion, duplication, translocation, and inversion.arrow_forwardVariations in Chromosome NumberAneuploidy Describe the process of nondisjunction and explain when it takes place during cell division.arrow_forwardAdentify the type of chromosomal abnormality shown here: inversion O deletion O insertion O translocation. 1 Previousarrow_forward
- A girl and a boy were born to a young married couple. The girl is absolutely healthy. The examination of the boy's karyotype has shown 46 chromosomes. But one of the chromosomes of the 15th pair is longer than normal as a part of a chromosome from the 21st pair has joined it. How many autosomes and sex chromosomes are in the boy's karyotype? Name the type of the mutation. Is it possible to consider this pathology an inherited disorder?arrow_forwardA. Please explain the key differences between each of the following pairs of terms. (i) Haploid vs. monoploid (ii) Pericentric inversion vs. paracentric inversion (Please include a simple diagram, along with your written explanation.) (iii) Homologous chromosomes vs. homeologous chromosomes:arrow_forwardExplain the term Metaphase chromosome:arrow_forward
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