BIOLOGY (LOOSELEAF)-W/CONNECT
12th Edition
ISBN: 9781260692181
Author: Raven
Publisher: MCG
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Chapter 51, Problem 1S
Summary Introduction
To determine:
The changes that would be expected when there is mutation in the SRY gene such that a male embryo could not produce functional protein.
Introduction:
In humans, the sex determination system relies on the X and Y chromosome. The egg of female contributes X chromosome, while the sperm of the male contribute to either Y chromosome or X chromosome. These combinations will result in male (XY) or female (XX) offspring respectively. SRY (sex-determining region Y) is present on the Y chromosome of males, which is responsible for the development of male in humans.
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What statement best describes the difference between "fate maps" and "specification"?
If cells are transplanted from their normal region in an embryo to a different region in a recipient embryo, such cells will alter their fate, but not their specification.
Cell fate map describes the allocation of cells to the germ layers, ectoderm, mesoderm, or endoderm, whereas specification describes the exact tissues that each cell will ultimately become.
The fate map of an embryo does not change during development -- the fate map of an egg is the same as the fate map of a late blastula -- whereas the specification map of an embryo changes continually as the embryo's development proceeds.
The fate map of a cell is determined by labelling that cell and following it during normal development, whereas the specification state of a cell is determined by culturing a cell in an artificial medium and observing what tissues form from it.
You have an embryo in the eight-cell stage that shows radial and indeterminate cleavage. What would happen if you separated the cells of this embryo and placed them each into tissue culture media?
Each cell may continue development, but only into a nonviable embryo that lacks many parts.
Each cell may develop into a full-sized, normal embryo.
All eight cells would die immediately.
Each cell may deyelop into a smaller-than-average, but otherwise normal, embryo.
Which of the following best describes the concept of cell differentiation during the development of a multicellular organism?
A. During development, all of the genes in the embryo's cells are expressed at first, but fewer and fewer are expressed as time proceeds.
B. During development, different sets of genes are deleted from different cell types so that at the end of development, each cell has only the genes it needs.
C. During development, different cells become specialized to have different phenotypes even though they all originated from the same cell.
..
Chapter 51 Solutions
BIOLOGY (LOOSELEAF)-W/CONNECT
Ch. 51.1 - Prob. 1LOCh. 51.1 - Prob. 2LOCh. 51.1 - Prob. 3LOCh. 51.2 - Prob. 1LOCh. 51.2 - Prob. 2LOCh. 51.3 - Prob. 1LOCh. 51.3 - Prob. 2LOCh. 51.3 - Prob. 3LOCh. 51.4 - Prob. 1LOCh. 51.4 - Explain ovulation and the female reproductive...
Ch. 51.4 - Prob. 3LOCh. 51.5 - Prob. 1LOCh. 51.5 - Describe causes of infertility.Ch. 51 - Prob. 1DACh. 51 - Why might it be adaptive for an individual to be...Ch. 51 - Prob. 2IQCh. 51 - Why do you think the brain is affected when the...Ch. 51 - You have discovered a new organism living in tide...Ch. 51 - Prob. 2UCh. 51 - Prob. 3UCh. 51 - Which of the following structures is the site of...Ch. 51 - FSH and LH are produced by the a. ovaries. b....Ch. 51 - Prob. 6UCh. 51 - Mutations that affect proteins in the acrosome...Ch. 51 - In humans, fertilization occurs in the____, and...Ch. 51 - The testicles of male mammals are suspended in the...Ch. 51 - Prob. 1ACh. 51 - Which of the following is a major difference...Ch. 51 - Prob. 3ACh. 51 - Internal and external fertilization differ in that...Ch. 51 - Prob. 1SCh. 51 - Why do you think that amphibians and many fish...Ch. 51 - How are the functions of FSH and LH similar in...Ch. 51 - Prob. 4SCh. 51 - Why are all parthenogenic parents female?
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