1 SEM ACC W/RAVEN CARDED
12th Edition
ISBN: 9781265486297
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 52, Problem 2A
In the Spemann experiment, when the dorsal lip is transplanted, the recipient embryo then has a second source of molecules that
a. specifies ventral fate.
b. inhibits the molecules that specify ventral fate.
c. specifies dorsal fate.
d. inhibits the molecules that specify dorsal fate.
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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.
The expression of maternal-effect genes directly leads to
a. the establishment of body axes.
b. segmentation.
c. determination.
d. cell differentiation.
What is one of the ethical issues related to using embryonic stem cells?
O A. Embryonic cells are donated.
B. Embryonic cells need to be revived from dead tissue.
O C. Embryonic cells are harvested from young embryos.
O D. Embryonic cells are unfertilized and become fertilized through in vitro fertilization.
Chapter 52 Solutions
1 SEM ACC W/RAVEN CARDED
Ch. 52.1 - Describe the events involved in fertilization.Ch. 52.1 - Prob. 2LOCh. 52.2 - Prob. 1LOCh. 52.2 - Prob. 2LOCh. 52.2 - Prob. 3LOCh. 52.3 - Prob. 1LOCh. 52.3 - Compare gastrulation in different animals.Ch. 52.3 - Name the extraembryonic membranes in amniotes.Ch. 52.4 - Prob. 1LOCh. 52.4 - Prob. 2LO
Ch. 52.4 - Prob. 3LOCh. 52.5 - Prob. 1LOCh. 52.5 - Explain the function of the organizer.Ch. 52.5 - Distinguish between primary and secondary...Ch. 52.6 - Describe the major developmental events in the...Ch. 52.6 - Explain the role of the placenta.Ch. 52.6 - Prob. 3LOCh. 52 - Data analysis Two different genes have mutant...Ch. 52 - Prob. 1IQCh. 52 - Prob. 1UCh. 52 - Which of the following plays the greatest role in...Ch. 52 - Gastrulation is a critical event during...Ch. 52 - Gastrulation in a mammal would be most similar to...Ch. 52 - Prob. 5UCh. 52 - Of the following processes, which occurs last? a....Ch. 52 - Which of the following would qualify as a...Ch. 52 - Prob. 1ACh. 52 - In the Spemann experiment, when the dorsal lip is...Ch. 52 - Suppose that a burst of electromagnetic radiation...Ch. 52 - Prob. 4ACh. 52 - Drug or alcohol exposure during which of the...Ch. 52 - Axis formation in amniotic embryos could be...Ch. 52 - Prob. 1SCh. 52 - You look up from your studying to see your dog,...Ch. 52 - Why doesnt a woman menstruate while she is...Ch. 52 - Spemann and Mangold were able to demonstrate that...
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- Which of the following statements about iPS cells is correct? A. They are derived from embryonic stem cells. B. Transcription factors play a key role in their production. C. When implanted into a mouse blastocyst, they are not able to produce viable offspring. D. They have never been used in a human clinical trial.arrow_forwardBased on the information scientists and doctors have been able to collect, compare embryonic stem cells to induced pluripotent stem cells (iPSCs), then choose which statement below correctly describes these two types of stem cells. a. They are equivalent. b. iPSCs have more potency than embryonic stem cells. c. Embryonic stem cells are far more potent than iPSCs d. Both embryonic stem cells and iPSCs are totipotent.arrow_forwardIn early mammalian development, compaction would likely be blocked by inhibiting expression of which of the following? a. Beta-catenin. b. E-cadherin. c. Bcl2. d. Cdx2.arrow_forward
- The expression of homeotic genes leads to a. the establishment of body axes. b. the formation of segments in the embryo. c. the determination of structures within segments. d. cell differentiation.arrow_forwardWhich of the following correctly explains how gene expression can change in a differentiating cell in an animal embryo?A. DNA methylation triggered by apoptosis leads to suppression of some genes and expression of others.B. Presence of germ layers trigger hormonal release from endocrine glands, signaling to certain cells to express genes.C. Cell signals through plasmodesmata allow coordination of cellular activities and cell differentiation.D. Cues from the cytoplasm and from surrounding cells can induce changes in gene expression.arrow_forwardThe FOXP gene strongly affects what else, in addition to brain development? A. The stomach and intestines B. The pituitary and adrenal glands C. The jaw and throat D. Blood pressure and heart ratearrow_forward
- Which of the following statements is TRUE? a. In mammals and chickens, the first cells to ingress through the primitive groove replace the hypoblast. b. In mammals and chickens, the first cells to ingress through the primitive groove become the hypoblast. c. In chickens the first cells through the primitive streak replace hypoblas, but in mammals the first cells to ingress through the primitive groove become the hypoblast. d. In mammals the first cells to ingress through the primitive groove replace the hypoblast, while in chickens the first cells to ingress become mesoderm.arrow_forwardFor pattern formation to occur, the cells in the developing embryo must a. “know” their position in the embryo. b. be determined during the earliest divisions. c. differentiate as they are “born.” d. must all be reprogrammed after each cell division.arrow_forwardWhich of the following best describes the concept of cell differentiation during the development of a multicellular organism? A. During development, all of the genes in the embryo's cells are expressed at first, but fewer and fewer are expressed as time proceeds. B. During development, different sets of genes are deleted from different cell types so that at the end of development, each cell has only the genes it needs. C. During development, different cells become specialized to have different phenotypes even though they all originated from the same cell. ..arrow_forward
- In Figure 13-2, the transplantation of certain regions of embryonic tissue induces the development of structures in new places. What are these special regions called, and what are the substances they are proposed to produce?arrow_forwardWhich statement below best describes whether or not there is an advantage of using iPSCs to induce repair of bodily damage within a patient over using embryonic stem cells that have been donated? a. Because the iPSCs originated from the patient and thus probably will avoid rejection by the patient’s own immune system. b. Embryonic stem cells are easier to obtain. c. There are more ethical issues involved in iPSCs. d. Only embryonic stem cells are vastly renewable.arrow_forwardWhen comparing gene expression of the cells of the ICM and those of the trophoblast, which of the following is TRUE? a. Cells of the trophoblast express Nanog. b. Cells of the ICM and trophoblast will show the same gene expression pattern. c. ICM cells express Cdx2. d. Cells of the ICM express Oct 4arrow_forward
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