Chromosomes are duplicated during the S phase of the cell cycle, which occurs during interphase. This is when DNA replication takes place to ensure that each daughter cell receives a complete set of chromosomes during cell division.
IDK LOL at least i answered actualy i do when that happens u get pimples the size of a centimeter then to calculate it u must find what pie equals athen do this format. 12x(B to the second power times 4) subtract 923 :P good luck hehe...
No, crossing over occurs during the first meiotic division when homologous chromosomes exchange genetic material. In the second meiotic division, the chromatids of each chromosome separate, resulting in the formation of haploid daughter cells.
The short second phase of mitosis is called the metaphase. During metaphase, the duplicated chromosomes align and attach to the spindle fibers at the center of the cell. This alignment ensures that during the following phase, anaphase, each daughter cell receives an equal number of chromosomes.
A failure of homologous chromosomes to separate in meiosis is called nondisjunction. This can result in cells with an abnormal number of chromosomes, leading to genetic disorders such as Down syndrome. Nondisjunction can occur during either the first or second division of meiosis.
Chromosomes are duplicated during the S phase of the cell cycle, which occurs during interphase. This is when DNA replication takes place to ensure that each daughter cell receives a complete set of chromosomes during cell division.
Strictly speaking, the chromosomes are not copied during mitosis but already before cell division takes place. This phase is called INTERPHASE and is again divided into three phases, G1 (first gap), S (synthesis), and G2 (second gap). The replication of chromosomes only happens in the S phase.
IDK LOL at least i answered actualy i do when that happens u get pimples the size of a centimeter then to calculate it u must find what pie equals athen do this format. 12x(B to the second power times 4) subtract 923 :P good luck hehe...
A total of four daughter cells form. *apex*
No, crossing over occurs during the first meiotic division when homologous chromosomes exchange genetic material. In the second meiotic division, the chromatids of each chromosome separate, resulting in the formation of haploid daughter cells.
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The short second phase of mitosis is called the metaphase. During metaphase, the duplicated chromosomes align and attach to the spindle fibers at the center of the cell. This alignment ensures that during the following phase, anaphase, each daughter cell receives an equal number of chromosomes.
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During prophase, the chromosomes condense and become visible, the nuclear envelope breaks down. During metaphase, the chromosomes line up along the center of the cell. During anaphase, the sister chromatids separate and move towards opposite poles. Finally, during telophase, the chromosomes decondense, the nuclear envelope reforms, and the cell divides into two daughter cells during cytokinesis.
A failure of homologous chromosomes to separate in meiosis is called nondisjunction. This can result in cells with an abnormal number of chromosomes, leading to genetic disorders such as Down syndrome. Nondisjunction can occur during either the first or second division of meiosis.
The second phase of mitosis is called prophase. During prophase, chromosomes condense and become visible as distinct structures. In addition, the nuclear membrane starts to break down, allowing the chromosomes to move freely within the cell.
The stage when spindle fibers attach to chromosomes is during metaphase of mitosis or meiosis. Spindle fibers, which are made of microtubules, attach to the centromere region of chromosomes to help separate them correctly during cell division.