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Fiibers extending from cell pole to cell pole are called what?
Spindle fibers. They help separate chromosomes during cell division by attaching to the centromeres of each chromosome and pulling them to opposite poles of the cell.
If Eukaryote cell has 20 chrosomes and undergoes meiosis what is the resulting number of cells and chromosomes?
After meiosis in a eukaryotic cell with 20 chromosomes, four haploid cells are produced, each with 10 chromosomes. This process involves two rounds of cell division, resulting in the formation of gametes with half the number of chromosomes as the parent cell.
What happens during anaphase1?
the chromatids holding the chromosome together loosen
What do spindle fibers do during mitosis and meiosis?
Spindle fibers are responsible for separating and moving the chromosomes during cell division. In mitosis, they help pull sister chromatids apart to opposite poles of the cell, ensuring that each daughter cell receives a complete set of chromosomes. In meiosis, they perform a similar function but with the added complexity of separating homologous chromosomes during the first division and sister chromatids during the second division.
How is anaphase I of meiosis different than anaphase of mitosis?
In anaphase for both types of cell division, the centromeres of each chromosome separates and the spindle fibers pull apart the sister chromosomes. In mitosis, this is the shortest phase of cell division.However, the differences between mitosis and meiosis are different. Because meiosis is when chromosomes are "mixed and matched" in order to make new different combinations, the strands are only mixed up so when they split, they have new genes at their ends. Because mitosis is when chromosomes are duplicated, or cloned, and are copies of each other, when they split, the new cell is the exact same copy as the original.
How many chromosomes are present in a typical human cell at anaphase?
A typical human cell contains 46 chromosomes at anaphase, which is the stage of cell division when the chromosomes separate and move to opposite ends of the cell. This is because each chromosome in the cell is composed of two identical sister chromatids, resulting in a total of 46 individual chromosomes.
Fiibers extending from cell pole to cell pole are called what?
Spindle fibers. They help separate chromosomes during cell division by attaching to the centromeres of each chromosome and pulling them to opposite poles of the cell.
What is a example of anaphase?
An example of anaphase is the stage of cell division in which the sister chromatids separate and move towards opposite poles of the cell. This process is facilitated by the contraction of microtubules called spindle fibers. As a result of anaphase, each pole of the cell receives a complete set of chromosomes, ensuring that each daughter cell will have the correct number of chromosomes.
If Eukaryote cell has 20 chrosomes and undergoes meiosis what is the resulting number of cells and chromosomes?
After meiosis in a eukaryotic cell with 20 chromosomes, four haploid cells are produced, each with 10 chromosomes. This process involves two rounds of cell division, resulting in the formation of gametes with half the number of chromosomes as the parent cell.
Why does mitosis have to have microtubules in order to occur?
Mitosis require microtubules because they bind to the chromosomes and pull them to each pole of the cell. The cell can then divide with the respective chromosomes on separate halves of the cell.
What happens during anaphase1?
the chromatids holding the chromosome together loosen
How do new cells get the same genetic makeup?
It because of the impeccable mechanism of mitosis and cell cycle. During the S phase of cell cycle, the genetic material replicate. Suppose there are 12 chromosomes in the cell, then the 12 extra copies of these cell is made. The number of the chromosome is doubled and each chromosome is present in number of two identical copies. When the mitosis occurs two poles are created in the cell. The chromosomes align initially to the equatorial plate at the centre. Then the chromosomes move towards pole such that one copy of a chromosome moves to one pole and the other moves to other pole. When the cell divided the chromosomes are equally and identically distributed in both cells.
Random alignment of chromosomes contribute to genetic variation?
Random alignment of chromosomes occurs during Metaphase I in a cells meiosis. Random alignment is when the homologous pairs of chromosomes line up at the equator or middle of the cell, and are arranged by which member faces what pole. This allows equal opportunity for the chromosomes to migrate to a different cell.
How does a tetrad form in prophase I of meiosis?
In prophase I, doubled homologous chromosomes group together to form a tetrad.
What do spindle fibers do during mitosis and meiosis?
Spindle fibers are responsible for separating and moving the chromosomes during cell division. In mitosis, they help pull sister chromatids apart to opposite poles of the cell, ensuring that each daughter cell receives a complete set of chromosomes. In meiosis, they perform a similar function but with the added complexity of separating homologous chromosomes during the first division and sister chromatids during the second division.
How is anaphase I of meiosis different than anaphase of mitosis?
In anaphase for both types of cell division, the centromeres of each chromosome separates and the spindle fibers pull apart the sister chromosomes. In mitosis, this is the shortest phase of cell division.However, the differences between mitosis and meiosis are different. Because meiosis is when chromosomes are "mixed and matched" in order to make new different combinations, the strands are only mixed up so when they split, they have new genes at their ends. Because mitosis is when chromosomes are duplicated, or cloned, and are copies of each other, when they split, the new cell is the exact same copy as the original.
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.
