Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 3TYK
What is a homeotic mutant?
a. an individual with a structure located in the wrong place
b. an individual with an abnormal head-to-tail axis
c. an individual that is missing segments
d. An individual with double the normal number of structures
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Emybronic stem cells pose less of a threat for organ rejection as do an individual s own adult cells.
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Chapter 21 Solutions
Biological Science (6th Edition)
Ch. 21 - 1. What is apoptosis?
a. an experimental technique...Ch. 21 - In adult animals, ______ are a source of...Ch. 21 - 3. What is a homeotic mutant?
a. an individual...Ch. 21 - 4. A tool-kit gene is _________.
Ch. 21 - CAUTION A friend is interested in isolating genes...Ch. 21 - 6. How is determination distinct from...Ch. 21 - What is the connection between genetic regulatory...Ch. 21 - Which of the following provides the strongest...Ch. 21 - QUANTITATIVE Imagine a situation in which a...Ch. 21 - 10. PROCESS OF SCIENCE Some stickleback fish...
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- In an embryo from a homozygous Bicoid mutant female,which class(es) of gene expression is (are) abnormal?a. Gap genesb. Pair-rule genesc. Segment-polarity genesd. Hox genesarrow_forwardWhy are multiple copies of the X chromosome tolerated? A. Genes on the X chromosome are not expressed during development. B. The extra copies of the X chromosome are inactivated. C. There are no genes on the X chromosome that are detrimental when present in multiple copies D. The X chromosome only encodes sex related genesarrow_forwardWhat is the difference between a maternal-effect gene and a zygotic gene? Of the following genes that play a role in Drosophila development, which are maternal-effect genes and which are zygotic? Explain your answer. A. nanos B. Antp C. bicoid D. labarrow_forward
- What degree of differences would you expect to see in the DNA base sequences and epigenetic marks of monozygotic twins? a. Similar differences in DNA base sequence and epigenetic marks b. Greater differences in DNA base sequence than epigenetic marks c. Greater differences in epigenetic marks than DNA base sequence d. No differences in either DNA base sequence or epigenetic marksarrow_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_forwardIn marsupials, X inactivation occurs exclusively to paternally derived chromosomes. Which genes will ALWAYS be expressed in this situation? A. maternal X-linked genes B. paternal X-linked genes C. maternal Y-linked genes D. paternal Y-linked genesarrow_forward
- A cytoplasmic determinant can control development at the early stages of development because....? Group of answer choices a. it is a universal activator of all genes b. it is present evenly throughout the cytoplasm c. it is activated by cell division d. it is controlled by genes present in the cytoplasm e. it is laid down in the egg cell by the motherarrow_forwardWhich of the following is the sequence in which the segmentation genes act? a. Segment-polarity genes → gap genes → pair-rule genes b. Gap genes → pair-rule genes → segment-polarity genes c. Segment-polarity genes → pair-rule genes → gap genes d. Gap genes → segment-polarity genes → pair-rule genesarrow_forwardFor XCI to occur, where are the Xist and Tsix genes expressed?a. Xist is expressed only on Xa, and Tsix is expressed onlyon Xi.b. Xist is expressed only on Xi, and Tsix is expressed onlyon Xa.c. Xist is expressed only on Xa, and Tsix is expressed onlyon Xa.d. Xist is expressed only on Xi, and Tsix is expressed onlyon Xi.arrow_forward
- What is a biomarker? a. the color coding of different genes b. a protein that is uniquely produced in a diseased state c. a molecule in the genome or proteome d. a marker that is genetically inheritedarrow_forwardWhat is the difference between a proto-oncogene and an oncogene? a. oncogenes cause benign tumors (polyps), proto-oncogenes cause malignant tumors b. oncogenes transform cells to hyperproliferation, proto-oncogenes have a normal cellular role c. oncogenes have undergone post-translational modification, proto-oncogenes have not d. oncogenes have undergone intron splicing, proto-oncogenes have notarrow_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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