Question
In: Biology
Molecular Cell Biology List the two changes affecting chromosomes that make chromosome segregation during meiosis one...
Molecular Cell Biology
List the two changes affecting chromosomes that make chromosome segregation during meiosis one different from chromosome segregation during mitosis (do not mention microtubules in your answer).
Solutions
Expert Solution
- chromosome segregation is a process occur in eukaryotes, in which the two sister chromatids separate each other and migrate to opposite poles of nucleus.
- In first, the segregation of chromosomes occur in two phases of meiosis known as anaphase1 and anaphase 2 During the “interphase s” each of the chromosomes in the diploid cell is converted into two copies of same chromosomes called chromatids. These chromatids then pair with the homologous chromosome present in the same nucleus. This process is called synapsis. During synapsis, genetic recombination also occurs. After recombination, chromosome segregation occurs.
- in second , segregation during meiosis occurs in prophase 2. In this phase there is no round of DNA replication and hence the two chromatids comprising each chromosome split into different nuclei, so that each nucleus consist of single set of chromatids . This segregation is mediated by cohesin. The improper segregation during prophase 2 can lead to aneuploid gametes.
gladiator answered 1 year agoRelated Solutions
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how
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how many chromosomes are in a cell during prophase of
mitosis?
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Describe what happens to the chromosomes of a cell during each
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When do haploid cells first form during the process of
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What are the differences between Mitosis and Meiosis?
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When do haploid cells first form during the process of
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1) Describe what happens to the number of chromosomes during the two divisions of meiosis. a)The...
1) Describe what happens to the number of chromosomes during the
two divisions of meiosis.
a)The number of chromosomes is halved in the first division of
meiosis. In the second division, the number of chromosomes remains
the same.
b) The number of chromosomes is doubled in the first division of
meiosis. In the second division, the number of chromosomes is
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c) The number of chromosomes is halved in the first division of
meiosis. In the second division, the number...
As the chromosomes of a parent cell are duplicated and distributed to the two daughter cells during cell division
Changes in DNA structure during the cell cycle
As the chromosomes of a parent cell are duplicated and distributed to the two daughter cells during cell division, the structure of the chromosomes changes.
Answer the three questions for each phase of the cell cycle by dragging the yes and no labels to the appropriate locations in the table. Note: Assume that by the end of the M phase, the parent cell has not yet divided to form two daughter cells.
A diploid organism produces four gametes from one parent cell through the process of meiosis. Two...
A diploid organism produces four gametes from one parent cell
through the process of meiosis. Two gametes are found to have 4
chromosomes, one gamete is found to have 3 chromosomes and one
gamete is found to have 5 chromosomes. A) Is this the expected
number of chromosomes that would be found in each gamete following
a normal cycle of meiosis? If yes, explain why. If no, explain why
not and describe how the gamete situation described above occurred.
B)...
A diploid organism produces four gametes from one parent cell through the process of meiosis. Two...
A diploid organism produces four gametes from one parent cell
through the process of meiosis. Two gametes are found to have 4
chromosomes, one gamete is found to have 3 chromosomes and one
gamete is found to have 5 chromosomes.
A) Is this the expected number of chromosomes
that would be found in each gamete following a normal cycle of
meiosis? If yes, explain why. If no, explain why not and describe
how the gamete situation described above occurred.
B) ...
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