| Analysis of the search query | if nondisjunction occurs in meiosis ii during gametogenesis what will be the result at the completion |
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Top competitors on query "if nondisjunction occurs in meiosis ii during gametogenesis what will be the result at the completion"
SparkNotes: SAT Subject Test: Biology: Spermatogenesis and Oogenesis
http://www.sparknotes.com/testprep/books/sat2/biology/chapter7section2.rhtml Competition: low
First of all, oogenesis only leads to the production of one final ovum, or egg cell, from each primary oocyte (in contrast to the four sperm that are generated from every spermatogonium). The most important thing you need to remember about both processes is that they occur through meiosis, but there are a few specific distinctions between them
Dr. Ross's Vertebrate Embryology Course Home Page
http://facstaff.cbu.edu/~aross/embhome.htm Competition: low
"Three days after fertilization a human egg has divided into eight 'totipotent' cells, four of which are visible here, surrounded by smaller cells..." Source: Kanigel, R. In the past four years, only about 25 published research papers have focused on human pluripotent cells, and just a handful of labs worldwide have become adept at extracting and culturing them." Medical Terminology tutorial (Des Moines Univ.) Free online Medical Terminology Course (free online) material from U.S
Chromosomes in cells - Human Molecular Genetics - NCBI Bookshelf
http://www.ncbi.nlm.nih.gov/books/NBK7572/ Competition: low
At the early stages of development, individual cells in the embryo are totipotent: each cell retains the capacity to differentiate into all the different types of cell in the body. Other cells (often distinguished by the suffix -blast , as in osteoblasts, chondroblasts, myoblasts, etc.) divide actively and act as precursors of terminally differentiated cells
http://www.uwyo.edu/wjm/repro/spermat.htm Competition: low
There are 12 different stages of the cycle in the bull of about 14 days each; approximately four cycles within a given region of the tubule occur before an A1 spermatogonia is transformed into a spermatozoa. During mitosis: chromosomes condense, the nuclear envelope disappears, and spindle fibers begin to form from microtubules (prophase); centromeres of duplicate sister chromatids align along the spindle equator (metaphase); chromatids separate and migrate toward opposite poles (anaphase); the mitotic apparatus is disassembled, autonomous nuclear envelopes are established, and the chromosomes uncoil (telophase)
Cell Division
http://www.uic.edu/classes/bios/bios100/lecturesf04am/lect16.htm Competition: low
Regulation of the Cell Cycle The cell cycle is controlled by a cyclically operating set of reaction sequences that both trigger and coordinate key events in the cell cycle The cell-cycle control system is driven by a built-in clock that can be adjusted by external stimuli (chemical messages) Checkpoint - a critical control point in the cell cycle where stop and go-ahead signals can regulate the cell cycle Animal cells have built-in stop signals that halt the cell cycles and checkpoints until overridden by go-ahead signals. Telophase The chromosomes decondense The nuclear envelope forms Cytokinesis reaches completion, creating two daughter cells Compare Telophase to the Telophase I and to the Telophase II stages of mitosis
Chapter 15: If nondisjunction occurs in meiosis II ...
http://www.funnelbrain.com/c-616940-if-nondisjunction-occurs-meiosis-ii-duringgametogenesis-will.html Competition: low
All right reserved *SAT, AP and Advanced Placement Program are registered trademarks of the College Board, which was not involved in the production of, and does not endorse, this product
Meiosis - New World Encyclopedia
http://www.newworldencyclopedia.org/entry/Meiosis Competition: low
Sexual reproduction is a near universal characteristic of living organisms, as is the differentiation of organisms into either male or female (or plus and minus). Nondisjunction is a common mechanism for trisomy (the presence of an extra chromosome in each cell) or monosomy ( the loss of one chromosome from each cell)
http://biology.clc.uc.edu/courses/bio104/meiosis.htm Competition: low
Interestingly, because the homologous pairs line up during Metaphase I, there is a 50:50 chance of which one of each pair will go to each of the poles of the cell (like flipping a coin, where you can get either heads or tails). Therefore, in humans with 23 pairs of chromosomes, a gamete (egg or sperm) could have 223 or 8,388,604 possible combinations of chromosomes from that parent
Oogenesis - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Oogenesis Competition: low
In the brown alga Fucus, all four egg cells survive oogenesis, which is an exception to the rule that generally only one product of female meiosis survives to maturity. (In mammals, the first polar body normally disintegrates before dividing, so only two polar bodies are produced.) In mammals, the first part of oogenesis starts in the germinal epithelium, which gives rise to the development of ovarian follicles, the functional unit of the ovary
Meiosis - Molecular Biology of the Cell - NCBI Bookshelf
http://www.ncbi.nlm.nih.gov/books/NBK26840/ Competition: low
The same result is expected, however, if the two mutant genes are far apart on the same chromosome, as one or more crossover events will separate them at meiosis. At this stage, the sister chromatids are tightly apposed along their entire length, and the two duplicated homologs (maternal and paternal) that form each bivalent are seen to be physically connected at specific points
Human Chromosomal Disorders
http://www.biology.iupui.edu/biocourses/N100/2k2humancsomaldisorders.html Competition: low
Duplication: if the fragment joins the homologous chromosome, then that region is repeated Example - Fragile X: the most common form of mental retardation. Distinguish between the chromosomal alterations that are involved in the following human disorders: Down syndrome, Patau's syndrome, Edwards syndrome Klinefelters syndrome, XYY syndrome Trisomy X, Monosomy X 5
Meiosis - The Full Wiki
http://www.thefullwiki.org/Meiosis Competition: low
This content and its associated elements are made available under the same license where attribution must include acknowledgement of The Full Wiki as the source on the page same page with a link back to this page with no nofollow tag. The end result is production of four haploid cells (23 chromosomes, 1N in humans) from the two haploid cells (23 chromosomes, 1N * each of the chromosomes consisting of two sister chromatids) produced in meiosis I
http://quizlet.com/21647514/intro-to-cell-test-4-flash-cards/ Competition: low
false If an organism with the genotype AaBb produces gametes, what proportion of the gametes would be Bb? none Two mice are heterozygous for albinism (Aa) . If crossing over did not occur, which of the following statements about meiosis would be true? Select all that apply -The four daughter cells produced in meiosis II would all be different
http://www2.estrellamountain.edu/faculty/farabee/biobk/BioBookmeiosis.html Competition: low
In flowering plants (angiosperms) the multicelled visible plant (leaf, stem, etc.) is sporophyte, while pollen and ovaries contain the male and female gametophytes, respectively. Events of Prophase I (save for synapsis and crossing over) are similar to those in Prophase of mitosis: chromatin condenses into chromosomes, the nucleolus dissolves, nuclear membrane is disassembled, and the spindle apparatus forms
http://quizlet.com/7440068/chapter-10-meiosis-and-sexual-reproduction-flash-cards/ Competition: low
At the end of anaphase I, each chromosome is composed of two chromatids and at the end of anaphase II, sister chromatids have separated, becoming daughter chromosomes B. there is one chance in 23 of getting identical sets of chromosomes from one parent, times two because there are two parents; therefore, two siblings out of every 46 are really identical except for crossing-over
Meiosis - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Meiosis Competition: low
Each of the resulting chromosomes in the gamete cells is a unique mixture of maternal and paternal DNA, resulting in offspring that are genetically distinct from either parent. In female mammals, meiosis begins immediately after primordial germ cells migrate to the ovary in the embryo, but in the males, meiosis begins later, at the time of puberty
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/M/Meiosis.html Competition: low
Homologous dyads (pairs of sister chromatids) find each other and align themselves from end to end with the aid of an axial element (that contains cohesin). However, cells going through meiosis have checkpoints that monitor each pair of homologues for proper recombination of their DNA correct formation of the synaptonemal complex Any failure that is detected stops the process and usually causes the cell to self-destruct by apoptosis
Chapter 15: If nondisjunction occurs in meiosis II ...
http://www.funnelbrain.com/c-197786-if-nondisjunction-occurs-meiosis-ii-during-gametogenesis-wil.html Competition: low
All right reserved *SAT, AP and Advanced Placement Program are registered trademarks of the College Board, which was not involved in the production of, and does not endorse, this product
SparkNotes: SAT Subject Test: Biology: Spermatogenesis and Oogenesis
First of all, oogenesis only leads to the production of one final ovum, or egg cell, from each primary oocyte (in contrast to the four sperm that are generated from every spermatogonium). The most important thing you need to remember about both processes is that they occur through meiosis, but there are a few specific distinctions between them
Dr. Ross's Vertebrate Embryology Course Home Page
"Three days after fertilization a human egg has divided into eight 'totipotent' cells, four of which are visible here, surrounded by smaller cells..." Source: Kanigel, R. In the past four years, only about 25 published research papers have focused on human pluripotent cells, and just a handful of labs worldwide have become adept at extracting and culturing them." Medical Terminology tutorial (Des Moines Univ.) Free online Medical Terminology Course (free online) material from U.S
Chromosomes in cells - Human Molecular Genetics - NCBI Bookshelf
At the early stages of development, individual cells in the embryo are totipotent: each cell retains the capacity to differentiate into all the different types of cell in the body. Other cells (often distinguished by the suffix -blast , as in osteoblasts, chondroblasts, myoblasts, etc.) divide actively and act as precursors of terminally differentiated cells
There are 12 different stages of the cycle in the bull of about 14 days each; approximately four cycles within a given region of the tubule occur before an A1 spermatogonia is transformed into a spermatozoa. During mitosis: chromosomes condense, the nuclear envelope disappears, and spindle fibers begin to form from microtubules (prophase); centromeres of duplicate sister chromatids align along the spindle equator (metaphase); chromatids separate and migrate toward opposite poles (anaphase); the mitotic apparatus is disassembled, autonomous nuclear envelopes are established, and the chromosomes uncoil (telophase)
Cell Division
Regulation of the Cell Cycle The cell cycle is controlled by a cyclically operating set of reaction sequences that both trigger and coordinate key events in the cell cycle The cell-cycle control system is driven by a built-in clock that can be adjusted by external stimuli (chemical messages) Checkpoint - a critical control point in the cell cycle where stop and go-ahead signals can regulate the cell cycle Animal cells have built-in stop signals that halt the cell cycles and checkpoints until overridden by go-ahead signals. Telophase The chromosomes decondense The nuclear envelope forms Cytokinesis reaches completion, creating two daughter cells Compare Telophase to the Telophase I and to the Telophase II stages of mitosis
Chapter 15: If nondisjunction occurs in meiosis II ...
All right reserved *SAT, AP and Advanced Placement Program are registered trademarks of the College Board, which was not involved in the production of, and does not endorse, this product
Meiosis - New World Encyclopedia
Sexual reproduction is a near universal characteristic of living organisms, as is the differentiation of organisms into either male or female (or plus and minus). Nondisjunction is a common mechanism for trisomy (the presence of an extra chromosome in each cell) or monosomy ( the loss of one chromosome from each cell)
Interestingly, because the homologous pairs line up during Metaphase I, there is a 50:50 chance of which one of each pair will go to each of the poles of the cell (like flipping a coin, where you can get either heads or tails). Therefore, in humans with 23 pairs of chromosomes, a gamete (egg or sperm) could have 223 or 8,388,604 possible combinations of chromosomes from that parent
Oogenesis - Wikipedia, the free encyclopedia
In the brown alga Fucus, all four egg cells survive oogenesis, which is an exception to the rule that generally only one product of female meiosis survives to maturity. (In mammals, the first polar body normally disintegrates before dividing, so only two polar bodies are produced.) In mammals, the first part of oogenesis starts in the germinal epithelium, which gives rise to the development of ovarian follicles, the functional unit of the ovary
Meiosis - Molecular Biology of the Cell - NCBI Bookshelf
The same result is expected, however, if the two mutant genes are far apart on the same chromosome, as one or more crossover events will separate them at meiosis. At this stage, the sister chromatids are tightly apposed along their entire length, and the two duplicated homologs (maternal and paternal) that form each bivalent are seen to be physically connected at specific points
Human Chromosomal Disorders
Duplication: if the fragment joins the homologous chromosome, then that region is repeated Example - Fragile X: the most common form of mental retardation. Distinguish between the chromosomal alterations that are involved in the following human disorders: Down syndrome, Patau's syndrome, Edwards syndrome Klinefelters syndrome, XYY syndrome Trisomy X, Monosomy X 5
Meiosis - The Full Wiki
This content and its associated elements are made available under the same license where attribution must include acknowledgement of The Full Wiki as the source on the page same page with a link back to this page with no nofollow tag. The end result is production of four haploid cells (23 chromosomes, 1N in humans) from the two haploid cells (23 chromosomes, 1N * each of the chromosomes consisting of two sister chromatids) produced in meiosis I
false If an organism with the genotype AaBb produces gametes, what proportion of the gametes would be Bb? none Two mice are heterozygous for albinism (Aa) . If crossing over did not occur, which of the following statements about meiosis would be true? Select all that apply -The four daughter cells produced in meiosis II would all be different
In flowering plants (angiosperms) the multicelled visible plant (leaf, stem, etc.) is sporophyte, while pollen and ovaries contain the male and female gametophytes, respectively. Events of Prophase I (save for synapsis and crossing over) are similar to those in Prophase of mitosis: chromatin condenses into chromosomes, the nucleolus dissolves, nuclear membrane is disassembled, and the spindle apparatus forms
At the end of anaphase I, each chromosome is composed of two chromatids and at the end of anaphase II, sister chromatids have separated, becoming daughter chromosomes B. there is one chance in 23 of getting identical sets of chromosomes from one parent, times two because there are two parents; therefore, two siblings out of every 46 are really identical except for crossing-over
Meiosis - Wikipedia, the free encyclopedia
Each of the resulting chromosomes in the gamete cells is a unique mixture of maternal and paternal DNA, resulting in offspring that are genetically distinct from either parent. In female mammals, meiosis begins immediately after primordial germ cells migrate to the ovary in the embryo, but in the males, meiosis begins later, at the time of puberty
Homologous dyads (pairs of sister chromatids) find each other and align themselves from end to end with the aid of an axial element (that contains cohesin). However, cells going through meiosis have checkpoints that monitor each pair of homologues for proper recombination of their DNA correct formation of the synaptonemal complex Any failure that is detected stops the process and usually causes the cell to self-destruct by apoptosis
Chapter 15: If nondisjunction occurs in meiosis II ...
All right reserved *SAT, AP and Advanced Placement Program are registered trademarks of the College Board, which was not involved in the production of, and does not endorse, this product
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