What is prometaphase in the cell cycle?

Prometaphase is the second phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prometaphase, the physical barrier that encloses the nucleus, called the nuclear envelope, breaks down.

Is prophase the same as prometaphase?

In prophase, the nucleolus disappears and chromosomes condense and become visible. In prometaphase, kinetochores appear at the centromeres and mitotic spindle microtubules attach to kinetochores.

Why is there a prometaphase?

Prometaphase is the phase of mitosis following prophase and preceding metaphase, in eukaryotic somatic cells. Forces exerted by protein “motors” associated with spindle microtubules move the chromosomes toward the centre of the cell. Prometaphase is not always presented as a distinct part of mitosis.

What happens during prometaphase in animal cells?

Prometaphase: In this stage the nuclear envelope breaks down so there is no longer a recognizable nucleus. Some mitotic spindle fibers elongate from the centrosomes and attach to kinetochores, protein bundles at the centromere region on the chromosomes where sister chromatids are joined.

What prometaphase 1?

Prometaphase 1 The second stage of the first meiotic division (meiosis I), during which the nuclear envelope breaks down, allowing microtubule access to chromosomes.

Which phase of cell cycle is the longest?

interphase
During interphase, the cell undergoes normal growth processes while also preparing for cell division. It is the longest phase of the cell cycle, cell spends approximately 90% of its time in this phase. In order for a cell to move from interphase into the mitotic phase, many internal and external conditions must be met.

Is late prophase prometaphase?

Late prophase (prometaphase). The nuclear envelope breaks down and the chromosomes are fully condensed. In late prophase (sometimes also called prometaphase), the mitotic spindle begins to capture and organize the chromosomes. The nuclear envelope breaks down, releasing the chromosomes.

What is a daughter chromosome?

Definition: A daughter chromosome is a chromosome that results from the separation of sister chromatids during cell division. Paired chromatids are held together at a region of the chromosome called the centromere. The paired chromatids or sister chromatids eventually separate and become known as daughter chromosomes.

What happen in prophase 1?

During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent. Chromosomal condensation allows these to be viewed in the microscope.

Which cell cycle is the shortest?

Mitotic phase
In concern to the above question, The correct answer is option D. Note: The shortest phase of the cell cycle is the Mitotic phase (M phase) and the longest phase of the cell cycle is G-1 phase.

Which is the shortest phase?

Hint: The shortest phase is a part of Meiosis I in cell division. It involves the separation of homologous chromosomes, which start moving towards the opposite poles after they are aligned at the equator. Complete answer: The shortest phase of mitosis is Anaphase I.

Why is it called a daughter cell?

Answer: So naturally organisms/cells capable of producing offspring are also given a feminine trait. The parent cell is often called the mother cell, and the daughter cells are so named because they eventually become mother cell themselves.

What is cell in prophase?

Prophase is the first stage of mitosis in animal cells, and the second stage of mitosis in plant cells. At the start of prophase there are two identical copies of each chromosome in the cell due to replication in interphase . These copies are referred to as sister chromatids and are attached by DNA element called the centromere .

What are cells reappear during telophase?

The chromosomes now begin to uncoil into a more extended form that permits gene expression. Nuclear membranes reform and nucleoli reappear during telophase. Moreover, telophase is the reversal of the process of prophase, bringing the cell back to the interphase.

Is the cell in prophase II a haploid cell?

Prophase II prepares the cell for secondary meiotic division where two haploid cells eventually form four haploid cells, each containing half of the genetic information previously contained in the original, replicated diploid cell. Jun 18 2019

What phase does the cell replicate its chromosomes?

During meiosis, chromosomes are replicated once in S phase (just like mitosis) into sister chromatids, but the cell divides twice. As with mitosis, the first step in this process is DNA replication, so that each of the 46 chromosomes exists as a duplicated sister chromatid.

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