EBK BIOLOGY
11th Edition
ISBN: 8220102797352
Author: Raven
Publisher: YUZU
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Textbook Question
Chapter 25, Problem 4U
Hox genes are
a. found in both plants and animals.
b. found only in animals.
c. found only in plants.
d. only associated with genes in the MADS complex.
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Students have asked these similar questions
1a) Why is it possible for you to study the eye colour gene by extracting cheek cells?
a. Because the nucleus of every cell in the human body contains the same genetic information.
b. Because the cheek cells are located near the cells of the eye and so they are able to exchange DNA.
c. Because all genes in the human body are expressed at all times so it is easy to study them.
d. All of the above are possible explanations.
1b) What is the purpose of heating the sample to 75°C following addition of the 0.2M NaOH solution?
a. To denature the histone proteins that are keeping the DNA tightly coiled.
b. To ensure that all the DNA is removed from the swab in preparation for PCR.
c. To breakdown the cheek cell membrane to release the DNA from the cell.
d. It breaks down the circular DNA down into linear fragments so that they will be easier to visualize.i
Which of the following statements about the differential expression of human genes is correct?
A. Differential expression does not occur during embryogenesis (development of the embryo).
B. The unused genes in differentiated cells no longer retain the potential to be expressed.
C. Gene expression patterns of all cells are identical.
D. Every cell nucleus contains the complete genome established in the fertilized egg.
At birth a child has got blue eyes, but now his/her eyes turn brown. Which of the following statements would best explain the observed phenomena?
A. The child does not have brown pigment at birth
B. Eye’s colour at birth is affected by mother’s gene
C. Gene repressor for brown pigment produced is not yet active
D. Gene activatior for brown pigment production is not yet active at birth
E. All of the above statements are false
Chapter 25 Solutions
EBK BIOLOGY
Ch. 25 - Heterochrony is a. the alteration of the spatial...Ch. 25 - Vast differences in the phenotypes of organisms as...Ch. 25 - Homoplastic structures a can Involve convergence...Ch. 25 - Hox genes are a. found in both plants and animals....Ch. 25 - The Brachyury and Thx5 in vertebrates and the Ap3...Ch. 25 - Which of the following statements about Pax6 is...Ch. 25 - Which of the following statements about TbxS is...Ch. 25 - Prob. 8UCh. 25 - Transcription factors are a. genes. b. sequences...Ch. 25 - Independently derived mutations of the CTC gene in...
Ch. 25 - Prob. 1ACh. 25 - Prob. 2ACh. 25 - The Eda allele that causes reduced armor...Ch. 25 - Prob. 4ACh. 25 - The paired-like homeodomain transcription factor 1...Ch. 25 - From the chapter on evolution of development it...Ch. 25 - Phenotypic diversity among major groups of...Ch. 25 - Critique the argument that eyes have multiple...Ch. 25 - Prob. 5SCh. 25 - Having read all of this chapter return to the clam...
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- In comparison to experimental results from the genetic manipulation of an invertebrate model, what pathologic outcome(s) would suggest that multiple homologs of a disease gene are present in humans? a. Missing the essential gene homolog that is lethal in fruit flies is also lethal in human infants. b. Different homologs of the essential gene are each expressed in different human organs, and mutations in these duplicated genes cause organ-specific diseases. c. Different homologs of the essential gene are each expressed in different stages of early child development, and mutations in each of these duplicated genes cause different diseases. d. In humans, defects in different homologs of the essential gene cause different loss-of-function diseases due to subfunctionalization. e. The essential gene is lethal in fruit flies, but there is no disease phenotype exhibited in people.arrow_forwardYou are studying Hox genes in crane flies (Leptotarsus testaceus). The cranefly genome is sequenced, and in craneflies. Using your understanding of Hox genes, design an experiment testing where the homolog of the EVE gene is expressed in cranefly embryos. you have access to this sequence. You are interested in studying the EVE genearrow_forwardfill in the blank: a. lincRNA plays a role in regulating ___ making genes but they themselves are encoded in the genome that is considered _____ DNA. b. The most well known example of RNA regulating the expression of DNA is the production of the ___ that coats one copy of the X chromosome in a female forming the ____.arrow_forward
- Which of the following statement(s) is/are true with regard to positional information in Drosophila? A. Morphogens are a type of molecule that conveys positional information. B. Morphogenetic gradients are established only in the oocyte, prior to fertilization. C. Cell adhesion molecules also provide a way for a cell to obtain positional information.arrow_forwardDevelopmental genes are often highly conserved. However, organisms with very similar genes can appear quite different. How is this possible? A. The genes may usually undergo mutation during development, resulting in the production of varied proteins in individual cells. B. If an identical gene is turned on at different stages in development, it can have very different effects. C. Even if genes are quite similar, they always produce proteins with different functions. D. If the genes are very similar, they must always be expressed similarly (at similar times in development) but may sometimes still have varying effects.arrow_forwardBefore Muller's discovery that radiation induces mutation, scientists had to work on spontaneous mutants that were found solely by phenotype differences in natural populations. Which of the features of Drosophila made it a fortuitous choice for Morgan and his colleagues? a. large number of visible phenotypes b. especially high rate of mutation c. both sexual and asexual reproduction d. having a long life cycle e. well-known biochemical pathwaysarrow_forward
- A single zebrafish gene function was inactivated completely by mutation, and a zebrafish with this mutation had none of its normal horizontal stripes. Foreach of the following statements, indicate whether the statement is certainly true, certainly untrue, or if thereis insufficient information to decide.a. The normal gene function is required for the viability of the zebrafish.b. The normal gene function is required for the formation of stripes.c. The normal gene function is required to make thepigment deposited in the stripes.d. The gene is required in zebrafish only for stripeformation.arrow_forwardOf those in the following list, which organ(s)/tissue(s) is/are affected by mutations in this gene CAGATTGTGAAGAGGTCTCTTGA? select all that apply a. pancreas b. skin c. heart d. eyes e. spine and skeleton f. colonarrow_forwardResearchers studying the Dutch famine of the winter of 1944-45 found that effects of malnutrition during pregnancy were still seen two generations later, for example in rates of obesity. How could this environmental effect be inherited over generations? Choose the most likely answer A. The results were an artefact, because environmental conditions were not taken into account. B. Histone modifications such as acetylation are passed on through generations. C. All methylation patterns are scrubbed during development of an embryo. D. DNA methylation patterns can be passed on in a parent-of-origin specific manner.arrow_forward
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