Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 18, Problem 2TY
Summary Introduction
Introduction: A gene can be defined as a unit of inheritance of characteristics from the parent to its offspring. It helps in the transmission of characteristics across generations. The genes are comprised of
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Why is it easier to manipulate embryonic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell?
a.
As cells develop, signaling pathways can cause some genes to be turned off during development.
b.
Adult cells have different DNA content than do embryonic stem cells.
c.
Emybronic stem cells pose less of a threat for organ rejection as do an individual s own adult cells.
d.
It is no easier to manipulate emybronic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell.
Which of the following statements is incorrect? a. Some gene expression patterns can be passed to an individual's offspring. b. Expression of a master regulator triggers a gene expression cascade. c. X chromosome inactivation is necessary for normal development of male mammals.
You examine a maternal effect protein that regulates cell division. Will a mutation in this gene display a defect in the mother with the mutation, or in her offspring who have not inherited the mutation?
Chapter 18 Solutions
Biology
Ch. 18.2 - Prob. 1CCCh. 18.3 - Prob. 1CCCh. 18.3 - Prob. 1CSCh. 18.5 - Prob. 1CSCh. 18.5 - Prob. 1CCCh. 18.6 - Prob. 1EQCh. 18.6 - Prob. 2EQCh. 18.6 - Prob. 3EQCh. 18.6 - Prob. 1CCCh. 18.6 - Prob. 2CC
Ch. 18 - Which of the following is an example of an...Ch. 18 - Prob. 2TYCh. 18 - A female mouse that is Igf2 Igf2 is crossed to a...Ch. 18 - Prob. 4TYCh. 18 - Prob. 5TYCh. 18 - Prob. 6TYCh. 18 - Prob. 7TYCh. 18 - Prob. 8TYCh. 18 - Based on the ideas proposed by Morgan, which of...Ch. 18 - Extranuclear inheritance occurs because a. certain...Ch. 18 - Define epigenetics. Are all epigenetic changes...Ch. 18 - What is a Barr body? How is its structure...Ch. 18 - Core Concept: Information A core concept of...Ch. 18 - Prob. 1COQCh. 18 - Mendel studied seven traits in garden pea plants,...
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- Homeobox genes (a) are found in fruit flies but no other animals (b) tend to be expressed in the order that they appear on a chromosome (c) contain a characteristic DNA sequence (d) b and c (e) a, b, and carrow_forwardA temperature-sensitive mutant allele of Ras causes the Ras protein to be fixed in the GDP-bound state at the nonpermissive temperature. What phenotype would you expect a cell homozygous for this mutation to have at the nonpermissive temperature? A.) It would stop dividing. B.) It would divide continuously. C.) It would divide normally.arrow_forwardThe somatic stem cells are derived from source such as_________.a) Bone marrow, embryos, amniotic fluid and umbilical cord b) Embryos, bone, knee, foetus c) Bone marrow, fluid, umbilical cord, joint cells d) Embryo, foetus, umbilical cord, fluid.arrow_forward
- 1.) What is one type of cell that CANNOT arise from the differentiation of a mesenchymal stem cell? A. A neuron B. A muscle cell C. An egg cell D. A bone cell 2. there is the statement: "Both stem cells and specialized cells have all the same genes. They differ in the regulation of those genes and express very different sets of genes ". Which one of the following explanations best accounts for this difference in stem cell and specialized cell gene expression? A. Stem cells and specialized cells have different activators and repressors that affect transcription B. Stem cells and specialized cells have different promoter sequences for their genes, thus affecting transcription C. Stem cells and specialized cells have different ribosomes that affect translation D. Stem cells and specialized cells use different start codons on mRNAs, thus affecting translationarrow_forwardD. In mice, the Igf2 gene inherited from the mother is never expressed in her offspring? Explain. E. What genes are deleted in a female born with Angelman syndrome. Which parent transmitted the deletion to her?arrow_forwardWhat piece of a transcript is utilized to localize the mRNA and why is this critical to development? a. 3'UTR; protein gradients have a large influence on gene expression of cells b. 5'UTR; protein gradients have a large influence on gene expression in cells c. the promoter; it has a large influence on protein production within a cell d. The TATA box; it has a large influence on protein production within a cellarrow_forward
- What is the phenotype of the gnom mutant? A. Loss of cell fate B. Lack of cell-cell communication C. loss of embryo polarity D. Failure of cell differentiationarrow_forwardIn a wild-type cell, the function of a protein encoded by a tumor-suppressor gene is to cause a cell to ______. A.) stop dividing B.)extend its telomeres C.) grow toward a new blood vessel D.) respond to a growth factorarrow_forwardYou observe that a particular gene is being transcribed during development. How can you tell whether the expression of this gene is under transcriptional or translational control?arrow_forward
- According to the Lyon hypothesis,a. one of the X chromosomes is converted to a Barr body insomatic cells of female mammals.b. one of the X chromosomes is converted to a Barr body in allcells of female mammals.c. both of the X chromosomes are converted to Barr bodies insomatic cells of female mammals.d. both of the X chromosomes are converted to Barr bodies inall cells of female mammals.arrow_forwardMaster regulatory genes play critical roles in development. Predict the MOST likely fate of a fly embryo where master regulatory genes were nonfunctional due to mutation. A. Cell division would stop, and the embryo would halt development. B. The embryo would be a collection of undifferentiated cells because they never get the message that will send them down a determination pathway. C. The embryo would be a combination of differentiated and undifferentiated cells because, even in the absence of a functional master regulatory gene, some cells will differentiate on their own. D. The embryo would continue to develop, but there is a high probability that some limbs may end up in the wrong place in the adult.arrow_forwardBRCA1 is a gene that codes for a tumor suppressor protein. If a person inherits a mutation in BRCA1, it greatly increases his or her risk of developing breast cancer. Are the cancer-causing mutations in the BRCA1 gene more likely to: A) not affect expression of the gene B) increase expression of the gene C) decrease expression of the genearrow_forward
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