HUMAN BIOLOGY: CONCEPTS - 9780134312729
8th Edition
ISBN: 2819260095972
Author: Johnson
Publisher: PERUSALL
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Chapter 20, Problem 9TY
Summary Introduction
Introduction:
There are two types of cells in the body, somatic cells and germ cells. The gametes (eggs and sperms) are called as the germs cells and rest of the cells are called the somatic cells. The genes in the somatic cells do not get passed on to the progeny.
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Students have asked these similar questions
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.
How can epistasis decrease the number of phenotypes observed in apopulation?a. One gene may mask the expression of another gene.b. One allele may mask the expression of another allele of the samegene.c. Genes may become silenced after exposure to certainenvironmental cues.d. Genes may be inactivated if they are on an X chromosome.
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 differentiation
Chapter 20 Solutions
HUMAN BIOLOGY: CONCEPTS - 9780134312729
Ch. 20 - Prob. 1QCCh. 20 - GM foods are created for a variety of reasons,...Ch. 20 - Should foods that contain genetically modified...Ch. 20 - Explain how DNA is sequenced.Ch. 20 -
2. Describe the enzymes used in recombinant DNA...Ch. 20 - Prob. 3CRCh. 20 - Discuss the polymerase chain reaction technique,...Ch. 20 - Prob. 5CRCh. 20 - Prob. 6CRCh. 20 - Prob. 7CR
Ch. 20 - Prob. 8CRCh. 20 - Prob. 9CRCh. 20 -
10. List the diseases that gene therapy may be...Ch. 20 - Prob. 1TYCh. 20 - Prob. 2TYCh. 20 - Which of the following is used to separate...Ch. 20 - Genetically engineered human insulin, human growth...Ch. 20 - Prob. 5TYCh. 20 - All of the following statements about transgenic...Ch. 20 -
7. "Gene pharming” refers to:
a. using transgenic...Ch. 20 - Prob. 8TYCh. 20 - Prob. 9TYCh. 20 - Prob. 10TYCh. 20 - Which of the following is needed for sequencing...Ch. 20 - A tiny amount of blood was recovered from a crime...Ch. 20 - Which technique will allow amplification of the...Ch. 20 - A gene for a bacterial protein with insecticide...Ch. 20 - Prob. 15TYCh. 20 -
1. What do you think are the chances that someone...Ch. 20 - Imagine a future in which the respiratory effects...Ch. 20 - Prob. 3AWKCh. 20 - Prob. 4AWKCh. 20 - Prob. 5AWKCh. 20 - There is interest in producing vaccines in foods....Ch. 20 - Transgenic plants have the potential to improve...
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- What 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_forwardWhich gene program is described correctly? A. Cell division is the process whereby identical cells begin to specialize into specific cell types. B. Signal induction identifies important body axes such as anterior-posterior and dorsal-ventral. C. Differentiation increases the number of cells, so an organism can grow larger. D. Morphogenesis is the process whereby cells identify where they are in three-dimensional space.arrow_forwardWhich is NOT a way that deletions can cause abnormal phenotypes? A. Haploinsufficient genes can result because too much gene product is produced. B. Recessive mutations may be expressed if the wild-type allele is deleted, a phenomenon called pseudodominance. C. If the centromere is deleted, then the whole chromosome could be lost during cell division. D. All of the above 1 pointsarrow_forward
- Which observation led Thomas Morgan to realize that the gene for fruit fly eye color was located on a sex chromosome? a. He noticed that only male F2 flies could have white eyes; no females displayed this trait. b. He saw that the F2 generation of flies had the classic 3:1 phenotypic ratio of red eyes to white eyes c. He read it in a biology textbook d. He noticed that only mutant flies had white eyesarrow_forwardIs this true or false? a. Fertilization is followed by a cleavage, a period of rapid cell division without growth. b. From the process above, this results in the production of a large number of cells called blastomeres. c. In sexual reproduction, the offspring have the same combinations of genes as their parents. d. Sequential hermaphroditism occurs when an animal is one sex during one phase of its lifecycle and the opposite sex during another phasearrow_forwardWhat is the unit of transmission during Meiosis? A. chromosomes B. chromatids C. genes D. allelesarrow_forward
- 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.arrow_forwardWhat is a sex-limited gene? a. A gene on the X chromosome b. A gene on the Y chromosome c. A gene that sex hormones activate d. A gene that becomes active during sexual activityarrow_forwardA. How did Spemann separate the two cells of the embryo of a salamander in 1902? B. The process of removing a nucleus is calledarrow_forward
- If meiosis produce haploid cells, how is the diploid numberrestored for those organisms that spend most of their life cycle in the diploid state? a. DNA replication b. reverse transcription c. synapsis d. fertilizationarrow_forwardWhy are males more prone to having x-linked recessive disorders?a. Because the y chromosome is smaller than the x chromosome. b. Because the y chromosome is weaker than the X chromosome c. Because there is a chromosome that will inhibit the eexpression of the defective gene. d. Because there is no other chromosome that will mask the other defective chromosomearrow_forwardHow does X inactivation contribute to a person’s phenotype? a. It controls the number and kind of genes inherited on an X chromosome. b. It determines which X chromosome is expressed in a male. c. It allows for the expression of either the maternal or the paternal X in different cells. d. It enhances the expression of Y-linked genes in males.arrow_forward
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