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Suppose that disjunction did not occur in one homologus pair of chromosomes during anaphase 1. How would this affect the chromosome number in the daughter cells?
Wiki User
∙ 12y ago
the chromosome number would vary in daughter cells because disjunction involves the separation of the duplicated chromosomes. disjunction is the whole process occurring in anaphase, so it would be as if anaphase didn't exist. cells would go straight from duplicating chromosomes to splitting. chromosome numbers in daughter cells would therefore be uneven and random because of the cell just splitting in half and whatever chromosomes being in the daughter cell being there
Wiki User
∙ 12y ago
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When do chromosomes separate abnormally in meiosis?
Non- disjunction during anaphase.
How many chromosomes does new cells have at the end of the cycle?
Anaphase 1: Before Meiosis begins, each chromosome is duplicated, like in Mitosis. When the cell is ready for meiosis, each duplicated chromosome is visible under the microscope as two Chromatids. Anaphase 2:The two cells formed during Meioses 1 now begin Meiosis 2. The chromatids of each duplicated chromosome will be separated during this division. (Anaphase also means Meiosis. Meiosis 1 and Meiosis 2 for instance. i hoped this helped!)
What does the chromosomes do in anaphase?
The centromeres split. The two chromatids separate, and each chromatid becomes a new chromosome. The new chromosomes move to opposite ends of the cell. The cell stretches out as the opposite ends are pushed apart.
What is the Disjunction of homologous chromosomes to the opposite poles?
During anaphase, the centrosomes (which have moved to opposite poles of the cell) release microtubules from their centrioles which then pull the chromosomes towards them, the double stranded chromosomes then split at the centromere and thus each pole of the chromosome has a copy of every chromosome. I assume you're talking about meiotic division though and in this case the spindle fibres/ microtubules dont split the chromosomes in half, rather, the chromosomes line up in homologous pairs (instead of in single file) and the spindle fibres pull one of the entire homologous double stranded chromosomes to its designated pole.
The chromosomes become invisible?
The stages of mitosis are: Interphase Preprophase Prophase Prometaphase Metaphase Anaphase Telophase Cytokinesis The Chromosome condense and become visible during prophase.
When do chromosomes separate abnormally in meiosis?
Non- disjunction during anaphase.
Does mutation occur in klinefelter syndrome?
Mutation of a gene is not necessary for Klinefelter's Syndrome. It is an autosomal disorder meaning that an entire chromosome failed to disjunction during anaphase and so there are 2 X chromosomes and a Y chromosome.
What happens to the chromosome during the anaphase?
what happens to chromosomes during anaphase
Do you see a place where problems could arise during Meiosis?
During the anaphase phase of meiosis, there can be non-dysjunction. This is when the spindle fibres do not effectively pull apart the chromosomes, leading to the cells having unequal numbers of chromosomes (ie. 3 and 1 rather than 2 and 2). An example of this is Trisomy 21, which is when there is non-disjunction of the 21st chromosome in either Anaphase I or Anaphase II. This causes Down's syndrome.
What does the chromosome's do?
A chromosome holds genetic information for the organism.
What happens to the homologous pair of chromosomes during the anaphase stage?
The chromosomes are dividing and becoming new chromosomes.
What stage of meiosis is the chromosome number reduced?
In Anaphase I
What is it called when chromosomes don't separate correctly during meiosis?
Nondisjunction
What is the difference between anaphase 1 and anaphase 2 in meiosis?
Hello, Anaphase 1 and 2 are both part of the process of meiosis, the division of sex cells, and they are both phases where chromosomes are being pulled apart by the centrioles. However, in anaphase one the chromosomes are lined up in homologous pairs, meaning that there are two chromosomes side by side, so when the centrioles pull they are separating two unconnected chromosomes. In anaphase two the chromosomes are lined up in single file. So the centrioles are pulling one chromosome apart. It eventually breaks the link at the centromere of the chromosome and results in two sister chromatids. Hope this is clear enough to understand!
How many chromosomes will the cell have during late second meiotic anaphase if the diploid chromosome number is 4?
2
How many chromosomes does new cells have at the end of the cycle?
Anaphase 1: Before Meiosis begins, each chromosome is duplicated, like in Mitosis. When the cell is ready for meiosis, each duplicated chromosome is visible under the microscope as two Chromatids. Anaphase 2:The two cells formed during Meioses 1 now begin Meiosis 2. The chromatids of each duplicated chromosome will be separated during this division. (Anaphase also means Meiosis. Meiosis 1 and Meiosis 2 for instance. i hoped this helped!)
What does disjunction mean?
inclusive : pvq : one or both have to be true exclusive : pV ( with a line under it but i dont know how to do that on my aptop) q :ony one coud be true
