Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 5, Problem 16CONQ
How many Barr bodies would you expect to find in humans with the following abnormal compositions of sex chromosomes?
A. XXY
B. XYY
C. XXX
D. X0 (a person with just a single X chromosome)
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How many Barr bodies would you expect to see in a human cellcontaining the following chromosomes?
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Chapter 5 Solutions
Genetics: Analysis and Principles
Ch. 5.1 - A female snail that coils to the left has...Ch. 5.1 - 2. What is the molecular explanation for maternal...Ch. 5.2 - 1. In fruit flies, dosage compensation is achieved...Ch. 5.2 - 2. According to the Lyon hypothesis,
a. one of...Ch. 5.2 - Prob. 3COMQCh. 5.3 - 1. In mice, the copy of the Igf2 gene that is...Ch. 5.3 - 2. A female mouse that is is crossed to a male...Ch. 5.3 - Prob. 3COMQCh. 5.3 - Prob. 4COMQCh. 5.4 - 1. Extranuclear inheritance occurs due to
a....
Ch. 5.4 - 2. A cross is made between a green four-o’clock...Ch. 5.4 - 3. Some human diseases are caused by mutations in...Ch. 5.4 - 4. Chloroplasts and mitochondria evolved from an...Ch. 5 - Define the term epigenetic inheritance, and...Ch. 5 - 2. Describe the inheritance pattern of maternal...Ch. 5 - A maternal effect gene exists in a dominant N...Ch. 5 - 4. A Drosophila embryo dies during early...Ch. 5 - 5. For Mendelian inheritance, the nuclear genotype...Ch. 5 - Suppose a maternal effect gene exists as a...Ch. 5 - Suppose that a gene affects the anterior...Ch. 5 - Explain why maternal effect genes exert their...Ch. 5 - As described in Chapter 22, researchers have been...Ch. 5 - 10. With regard to the numbers of sex chromosomes,...Ch. 5 - 11. What is a Barr body? How is its structure...Ch. 5 - Among different species, describe three distinct...Ch. 5 - 13. Describe when X-chromosome inactivation occurs...Ch. 5 - 14. Describe the molecular process of X-chromosome...Ch. 5 - Prob. 15CONQCh. 5 - 16. How many Barr bodies would you expect to find...Ch. 5 - 17. Certain forms of human color blindness are...Ch. 5 - A black female cat (XBXB) and an orange male cat...Ch. 5 - Prob. 19CONQCh. 5 - When does the erasure and reestablishment phase of...Ch. 5 - In what types of cells would you expect de novo...Ch. 5 - 22. On rare occasions, people are born with a...Ch. 5 - Genes that cause Prader-Willi syndrome and...Ch. 5 - Prob. 24CONQCh. 5 - What is extranuclear inheritance? Describe three...Ch. 5 - Prob. 26CONQCh. 5 - Among different species, does extranuclear...Ch. 5 - Extranuclear inheritance often correlates with...Ch. 5 - Prob. 29CONQCh. 5 - Prob. 30CONQCh. 5 - Which of the following traits or diseases is (are)...Ch. 5 - Prob. 32CONQCh. 5 - 33. Describe how a biparental pattern of...Ch. 5 - Figure 5.1 describes an example of a maternal...Ch. 5 - 2. Discuss the types of experimental observations...Ch. 5 - Prob. 3EQCh. 5 - As a hypothetical example, a trait in mice results...Ch. 5 - You have a female snail that coils to the right,...Ch. 5 - Prob. 6EQCh. 5 - 7. Figure 5.6 describes the results of...Ch. 5 - Prob. 8EQCh. 5 - In the experiment of Figure 5.6, why does a clone...Ch. 5 - Prob. 10EQCh. 5 - 11. A variegated trait in plants is analyzed using...Ch. 5 - 1. Recessive maternal effect genes are identified...Ch. 5 - Prob. 2QSDC
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- How many Barr bodies would you expect to see in a human cellcontaining the following chromosomes? a.XYarrow_forwardHumans have 46 chromosomes in each somatic cell.a. How many chromosomes does a child receive fromits father?b. How many autosomes and how many sex chromosomes are present in each somatic cell?c. How many chromosomes are present in a humanovum?d. How many sex chromosomes are present in ahuman ovum?arrow_forwardA young man went to the doctor because he had small testes and enlarged breasts. Through chromosomal testing, it was determined that this young man had the sex chromosomes XXY. Identify the syndrome with which this young man was MOST likely diagnosed. A. Turner syndrome B. Klinefelter syndrome C. Cri du Chat syndrome D. Down syndromearrow_forward
- what is the likelihood that a male will inherit a sex-linked mutation on the X chromosome from his father ? A. 0% B. 25% C. 50% D. 100%arrow_forwardIn humans, the number of chromosomes per set equals 23. Eventhough the following conditions are lethal, what would be the totalnumber of chromosomes for an individual with each condition?A. Trisomy 22B. Monosomy 11C. Triploidyarrow_forwardWhat biological mechanism allows humans with an XXX genotype to be healthy individuals? Group of answer choices A. haplodiploidy B. epistasis C. X inactivation D. small size of the Y chromosome E. small size of the X chromosomearrow_forward
- The diploid number of an organism is 12. How many chromosomes would be expected from the following conditions? a. monosomic for 1 chromosome b. trisomic for 2 chromosomes c. tetrasomic for 1 chromosome d. nullosomic for 2 chromosomes e. monoploid f. triploidarrow_forwardGenes G and H are located on chromosome 18. A woman with the genotype Gg Hh has a child with a man with the genotype GG HH. Unfortunately, the child has the genotype Ggg hhh and only survives for 6 months. When and in which parent did nondisjunction occur? Group of answer choices a. Meiosis II in the mother b. Meiosis I in the mother c. Meiosis I in the father d. Meiosis II in the fatherarrow_forwardIn humans, the number of chromosomes per set is 23. Even thoughthe following conditions are lethal, what would be the total numberof chromosomes for an individual with each condition?A. Trisomy 22B. Monosomy 11C. Triploidyarrow_forward
- At the end of meiosis in humans, four gametes are produced that are: A. Genetically identical to each other and to the parent cell B. Genetically identical to each other but genetically different from the parent cell C. Genetically different from each other and the parent cell D. Genetically identical to the parent cell from different from each otherarrow_forwardHow many Barr bodies would you expect to see in a human cellcontaining the following chromosomes? a.XXYarrow_forwardWhy are individuals with an extra chromosome 21, that causes Down syndrome, more numerous than individuals with an extrachromosome 3 or chromosome 16? A.] There are probably more genes on chromosome 21 than on the others B.] Chromosome 21 is a sex chromosome and chromosomes 3 and 16 are not C.] Down syndrome is not more common, just more serious D.] Extra copies of the other chromosomes are probably fatalarrow_forward
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