BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 19, Problem 3U
Summary Introduction
Introduction:
The cell division in developing embryo is faster than the cell division observed in the adults. This is because the embryo is still developing and it needs to develop enough cells to commit them to form different parts of the body.
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The experiment involving the movement of the zone of polarizing activity in the chick embryo demonstrated ... ?
Group of answer choices
a. control of formation of the dorsal/ventral axis in the chick
b. control of front/back (anterior/posterior) axis formation at the two cell stage
c. hormonal control of development continued after
d. how cells move and adhere to one another to complete developmental changes
e. formation of front/back (anterior/posterior) positional information in limb bud formation
The expression of maternal-effect genes directly leads to
a. the establishment of body axes.
b. segmentation.
c. determination.
d. cell differentiation.
Observations of the developing chick embryo reveal that skeletal muscles develop from the transplanted somites even though motor neurons innervating those muscles arise from chick neural crest cells. Based on these observations, what is MOST likely true?
A.
Neural crest cells differentiate into somites.
B.
Neural crest cells fuse with developing somite cells.
C.
Neural crest cells develop from migrating somite cells.
D.
Neural crest cells send projections into developing somites.
Chapter 19 Solutions
BIOLOGY
Ch. 19.1 - Prob. 1LOCh. 19.2 - Prob. 1LOCh. 19.2 - Prob. 2LOCh. 19.2 - Distinguish differences in cell division between...Ch. 19.3 - Prob. 1LOCh. 19.3 - Prob. 2LOCh. 19.3 - Prob. 3LOCh. 19.4 - Prob. 1LOCh. 19.4 - Prob. 2LOCh. 19.5 - Prob. 1LO
Ch. 19.5 - Describe D/V axis formation in Drosophila.Ch. 19.6 - Prob. 1LOCh. 19.6 - Prob. 2LOCh. 19.6 - Prob. 3LOCh. 19.7 - Prob. 1LOCh. 19.7 - Prob. 2LOCh. 19.7 - Prob. 3LOCh. 19 - What type of cells would develop if you injected...Ch. 19 - The sheep used for the donor nucleus had a...Ch. 19 - During development, cells become a. differentiated...Ch. 19 - Prob. 2UCh. 19 - Prob. 3UCh. 19 - Prob. 4UCh. 19 - Plant meristems a. are only present during...Ch. 19 - Prob. 6UCh. 19 - The process of nuclear reprogramming a. is a...Ch. 19 - What is the common theme in cell determination by...Ch. 19 - The process of reproductive cloning a. shows that...Ch. 19 - Prob. 3ACh. 19 - Prob. 4ACh. 19 - The genes that encode the morphogen gradients in...Ch. 19 - What would be the likely result of a mutation of...Ch. 19 - MADS-box, and Hox genes are a. found only in...Ch. 19 - The fate map for C. elegans (refer to figure 19.3)...Ch. 19 - Prob. 2SCh. 19 - You have generated a set of mutant embryonic mouse...Ch. 19 - Assume you have the factors in hand necessary to...
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- What is the molecular explanation for maternal effect?a. The father’s gene is silenced at fertilization.b. During oogenesis, nurse cells transfer gene products to theoocyte.c. The gene products from nurse cells are needed during thevery early stages of development.d. Both b and c are correct.arrow_forwardWhat is the explanation for maternal effect inheritance at the molecularand cellular level?a. The father’s gene is silenced at fertilization.b. During oogenesis, nurse cells transfer gene products to the oocyte.c. The gene products from nurse cells are needed during the veryearly stages of development.d. Both b and c are correct.arrow_forwardWhat are morphogens, exactly? Explain how they affect the patterning of tissue throughout embryonic development. Give 4 concrete instances to back up your claims.arrow_forward
- What are morphogens? Explain how they influence tissue patterning during embryonic development. Describe TWO specific examples to support your explanation.arrow_forwardNondisjunction can happen in males and females. It has been found to correlate with advanced maternal age but not paternal age. Why is that? A. Because estrogen promotes non-disjunction. B. Because oogenesis has a prolonged prophase and is more prone to have errors with maternal age. C. Because more mutations can happen in females. D. All of the above.arrow_forwardWhat type of genes regulate the development of anatomical segments and structures in an organism, directing the development of different body regions early in the organism's development? A. Homeotic genes B. Anatomical genes C. Allelic genes D. Methylated genesarrow_forward
- Molecular geneticists have performed experiments in which they altered the number of copies of the bicoid gene in flies, affecting the amount of Bicoid protein produced. a. What would be the effect on development of an increased number of copies of the bicoid gene? b. What would be the effect of a decreased number of copies of bicoid? Justify your answers.arrow_forwardWhich developmental stage is mismatched? a. second week—implantation b. third week—heart development begins c. fourth and fifth week—limb buds appear d. sixth through eighth week—all organ systems present e. None of these stages are mismatched.arrow_forwardFill in the blank. Maternal effect occurs because proteins and RNA specified by maternal genes accumulate in the _____ of the oocyte and influence the early development of the embryo.arrow_forward
- During the embryonic developmen, the trophoblast will developed into Select one: A. The embryonic disc B. The chorion C. The amnion and amniotic cavity D. The yolk sacarrow_forwardindicate the stage at which segmentation genes, homeotic genes, and egg-polarity genes would have an effect on development.arrow_forwardResearchers searched for an activator of neural tissue formation. What is the real pathway for this developmental phenomenon? a. Neural tissue formation occurs via BMP inhibition by proteins secreted from the organizer. b. Noggin activates ectoderm to become neural tissue. c. Nodal activation induces mesoderm to make neural tissue. d. Beta-catenin is required for formation of neural tissue.arrow_forward
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