there must be replication of chromosomes, replication of organelles, formation of tubulin protein so that it can form spindles in meiosis!
What has to happen before meiosis can occur?
For example, prior to undergoing meiosis, a cell goes through an interphase period in which it grows, replicates its chromosomes, and checks all of its systems to ensure that it is ready to divide. Like mitosis, meiosis also has distinct stages called prophase, metaphase, anaphase, and telophase.
What must happen before mitosis can begin apex?
What must happen before a cell can begin mitosis? The chromosomes must be duplicated, which occurs during interphase.
What must happen before mitosis can begin answers com?
Explanation: Mitosis is a cell division in which two daughter cells, which are genetically identical to one another, are produced. … However, before the commencement of the mitotic process or any division, the genetic material present in that cell must be duplicated in a process called DNA REPLICATION.
What must happen before meiosis can begin a the chromosomes must replicate B four haploid cells are produced C DNA must duplicate four times d the cell splits into four parts?
Answer Expert Verified
Your answer is B, the chromosomes must replicate. Meiosis is a process which takes one diploid cell (46 chromosomes) and makes 4 haploid cells (23 chromosomes). In order to do this, the DNA must divide. This is because it takes 46 chromosomes, to make 4*23 chromosomes, or 92.
What is the main purpose for meiosis?
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction.
How much DNA replication is required before meiosis can begin?
The initiation of meiosis requires both intrinsic and extrinsic signals. Meiosis is characterized by one round of DNA replication followed by two rounds of cell division, resulting in haploid germ cells.
What is the correct order of these meiotic events?
The correct order of mitotic events which occur during meiosis is: Formation of synaptonemal complex, recombination, separation of homologous chromosomes, separation of sister chromatids.
What is produced by mitosis?
Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells. Below we highlight the keys differences and similarities between the two types of cell division.
What would be the result of crossing over did not happen during meiosis in humans apex?
If crossing over did not occur during meiosis, there would be less genetic variation within a species. … Also the species could die out due to disease and any immunity gained will die with the individual.
What causes mitosis to begin?
At the beginning of prometaphase in animal cells, phosphorylation of nuclear lamins causes the nuclear envelope to disintegrate into small membrane vesicles. As this happens, microtubules invade the nuclear space. This is called open mitosis, and it occurs in some multicellular organisms.
What happens just before mitosis?
Before mitosis, the chromosomes are copied. They then coil up, and each chromosome looks like a letter X in the nucleus of the cell. The chromosomes now consist of two sister chromatids. Mitosis separates these chromatids, so that each new cell has a copy of every chromosome.
What happens before mitosis can begin?
Before a cell can enter the active phases of mitosis, however, it must go through a period known as interphase, during which it grows and produces the various proteins necessary for division. … If all conditions are ideal, the cell is now ready to move into the first phase of mitosis.