Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 5, Problem 7EQ
Figure 5.6 describes the results of X-chromosome inactivation in mammals. If fast and slow alleles of glucose-6-phosphate dehydrogenase (G-6-PD) exist in other species, what would be the expected results of gel electrophoresis for a heterozygous female of each of the following species?
A. Marsupial
B.Drosophila melanogaster
C.Caenorhabditiselegans (Note: We are considering the hermaphrodite in C. elegans to be equivalent to a female.)
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
In Drosophila sex determination
(Check all that apply.)
A) XY individuals transcribe the Sxl gene early but not late.
B
XX individuals carry the Sxl gene, XY individuals do not.
XX individuals transcribe the Sxl gene, XY individuals do not.
XX individuals express the Sxl protein, XY individuals do not.
E) The Sxl transcript (Pre-MRNA) is spliced differently in XX compared to XY individuals.
In Drosophila subobscura, the presence of a recessive gene called grandchildless (gs) causes the offspring of homozygous females, but not those of homozygous males, to be sterile. Can you offer an explanation as to why females and not males are affected by the mutant gene?
Give Detailed Solution (no need Handwritten)
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
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- describes the results of X-chromosome inactivation inmammals. If fast and slow alleles of glucose-6-phosphate dehydrogenase (G-6-PD) exist in other species, what would be theexpected results of gel electrophoresis for a heterozygous femaleof each of the following species?A. MarsupialB. Drosophila melanogasterC. Caenorhabditis elegans (Note: We are considering the hermaphrodite in C. elegans to be equivalent to a female.)arrow_forwardGive typed explanationarrow_forwardIn Drosophila melanogaster white (w) and miniature (m) wings are controlled by X-linked recessive genes with a recombination fruequency between them of approximately 38%. Show the sexes, phenotypes and proportions of offspring expected from the following mating:a. ++/wm female X wm maleb. +m/w+ female X w+ malec. w+/+m female X ++ maleIf we assume that white eyes and miniature wings are not x-linked but are linkedto the autosomal genes, what phenotypic frequencies would you expect from this cross: ++/wm female X ++/wm male?arrow_forward
- Imagine a scenario in which prenatal testing of a human female fetus indicates that the baby will have a normal XX karyotype but is heterozygous for a mutation that inactivates the Xist promoter. Allele “Xr” represents the mutated version of the Xist promoter, and “XR” represents the normal version of the Xist promoter. How will this mutation affect the process of X inactivation?A. "X inactivation will still be random with both mutant and normal X chromosomes being randomly inactivated" B. "The chromosome with the mutant Xist promoter will always be active" C. "The chromosome with the mutant Xist promoter will always be inactivated" D. "The normal X chromosome (no mutation in Xist) will always be active" E. "The normal X chromosome (no mutation in Xist) will always be inactivated"arrow_forwardThe normal sequence of markers on a certain Drosophila chromosome is ABCDE*FGHIJK, where the asterisk represents the centromere. Some flies were isolated with a chromosome aberration that has the following structure: ABCDE*FIJK . This represents a O a) deletion of GH segment O b) inversion of GH segment O c) deletion O d) deletion of centromerearrow_forwardHow do we know that Drosophila utilizes a different sexdetermination mechanism than mammals, even though it has the same sex-chromosome compositions in males and females?arrow_forward
- 4) Explain why you can NOT typically have a Male Calico cat. 5) Can you think of any unusual situation where you might be able to have a Male Calico cat? Explain how this might occur 6) Explain how X chromosome inactivation takes place in mammals at the chromosomal and molecular level. B. What genes are involved in inactivating a human X chromosome? C. What role does X chromosome-specific inactivating transcript --XIST-- non coding RNA play in the inactivation of the human X chromosome.arrow_forwardSuppose a researcher has three different Drosophila strains that have mutations in the bicoid gene called bicoid-A, bicoid-B, and bicoid-C; the wild type is designated bicoid +. To study these mutations, phenotypically normal female flies that are homozygous for the given bicoid mutation were obtained, and their oocytes were analyzed using a Northern blot to determine the size and/or amount of the bicoid mRNA and in situ hybridization to determine the bicoid mRNA location within the oocyte. A wild-type strain was also analyzed as a control. In both cases, the probe was complementary to the bicoid mRNA and the results are shown below. (Anterior is on the left; posterior is on the right.) Northern blot 1 2 - 3 4 In situ hybridization Wild type Lane 1. Wild type (bicoid*) Lane 2. bicoid-A Lane 3. bicoid-B Lane 4. bicoid-C bicoid-B bicoid-A bicoid-C Which mutation is likely to cause the embryo to develop two "anterior" ends? bicoid-B Obicoid-A bicoid-Carrow_forwardTo understand the genetic basis of locomotion in the diploid nematode Caenorhabditis elegans, recessive mutations were obtained, all making the worm “wiggle” ineffectually instead of moving with its usual smooth gliding motion. These mutations presumably affect the nervous or muscle systems. Twelve homozygous mutants were intercrossed, and the F1 hybrids were examined to see if they wiggled. The results were as follows, where a plus sign means that the F1 hybrid was wild type (gliding) and “w” means that the hybrid wiggled.a. Explain what this experiment was designed to test. b. Use this reasoning to assign genotypes to all 12 mutants. c. Explain why the phenotype of the F1 hybrids between mutants 1 and 2 differed from that of the hybrids between mutants 1 and 5arrow_forward
- A female Drosophila with the mutant phenotype 'notched wings' was mated to a wild type male. Two-thirds of the progeny were female. Half of the females had notched wings and the other half had wild type wings and all the male progeny had wild type wings. When the notched progeny were mated to their wild type brothers, the same results were obtained. Explain.arrow_forwardIn Drosophila, the X chromosomes may become attached to one another (XXn ) such that they always segregate together. Some flies thus contain a set of attached X chromosomes plus a Y chromosome. (a) What sex would such a fly be? Explain why this is so. (b) Given the answer to part (a), predict the sex of the off-spring that would occur in a cross between this fly and a normal one of the opposite sex. (c) If the offspring described in part (b) are allowed to interbreed, what will be the outcome?arrow_forwardExplain about how X chromosome inactivation takes place in mammals at the chromosomal and molecular level. B. What genes are involved in inactivating a human X chromosome? . C. What role does X chromosome-specific inactivating transcript --XIST-- non coding RNA play in the inactivation of the human X chromosome.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY