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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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.
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 genes
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Why are dominant mutations in proto-oncogenes generally not inherited? A. Inherited mutations in proto-oncogenes would not affect cell division rate B. Inherited mutations in proto-oncogenes would decrease cell division rate and no viable embryo would form C. Inherited mutations in proto-oncogenes would increase cell division rate and no viable embryo would form D. Dominant mutations in proto-oncogenes are always inheritedarrow_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_forwardA female born with Angelman syndrome carries a deletion in theAS gene (i.e., the UBE3A gene). Which parent transmitted thedeletion to her?a. Her father c. Either her mother or fatherb. Her motherarrow_forward
- Fruit fly segmentation begins during oogenesis and is affected by which maternal genes? (Note answers can be multiple or if not given from the option, provided the proper answer) a. Gap genes b. Oskar genes c. Pair-rule genes d. Gurken genesarrow_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
- 3) At the completion of meiosis, how many sets of chromosomes does each daughter cell contain? 1 2 3 4 4) Imagine that a cell within a tissue is expressing a protein that leaves the cell and can “signal” to other cells. Which cells will respond? A) Cells that are within range of the signaling molecule and have protein receptor that binds the signaling molecule B) Cells that are within range of the signaling molecule C) Cells that are within range of the signaling molecule and are expressing their own signaling molecules D) Cells that are within range of the signaling molecule and are the same type of cellarrow_forwardA 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_forwardA mutation occurs in the bicoid gene in a female fly. What will result if her eggs are fertilized? 1.Her embryos will be normal if they are fertilized by a male fly that contributed a wild type allele for bicoid 2.Her embryos will be normal if the male that fertilizes her eggs also has that same bicoid mutation 3.All of her embryos will be disrupted irrespective of the genotype of the father 4.Her embryos will develop normally but the adults will be sterilearrow_forward
- 57. male sex organs; unusually small testes A. down syndrome B. edward's syndrome C. patau's syndrome D. klinefelter's syndrome 60. In karyotyping, the purpose of culture is to be able to: A. halt cell division in metaphase B. obtain more speciens C. observe mitosis D. generate more cellsarrow_forwardIn mammals, males have X and Y sex chromosomes, while females have two Xs. While the Y sex chromosome has very few genes associated with it, the X sex chromosome has many that are important to maintain life. How do mammals account for this in terms of equaling out gene expression levels? A. Mammals do not need to account for this, but birds do. B. Females produce more proteins from X-linked genes than males do. C. The single X of the males works twice as hard to keep up with the female’s two Xs. D. The females have one X inactivated to permit the males to keep pace with them.arrow_forwardWhat is Patient C's karyotype? A. Last song syndrome B. Trisomy 21 C. Marfan syndrome D. Patau syndromearrow_forward
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