What is the phase in meiosis?

Answer 1

The longest phase in meiosis is Meiosis 1.

Answer 2

Prophase is the phase of mitosis in which the chromatin fibers in the nucleus become tightly coiled into observable chromosomes. The mitotic spindle also begins to form and centrosomes move away from each other.

Answer 3

Meiosis is the type of cell division by which germ cells (eggs and sperm) are produced. Meiosis involves a reduction in the amount of genetic material. It is divided into two steps: meiosis I and meiosis II. Meiosis I includes Prophase I, Metaphase I, Anaphase I and Telophase I. Meiosis II (Second division) includes Prophase II, Metaphase II, anaphase II and telophase II. Each of these phases are similar but not identical to the corresponding mitosis phases.

Prophase I is by far the most complicated phase of meiosis. It is much longer in meiosis than in mitosis.

In prophase 1;

The nuclear membrane disappears. One kinetochore forms per chromosome rather than one per chromatid, and the chromosomes attached to spindle fibers begin to move.

Synapsis (joining) of homologous chromosomes produces tetrads (also called bivalents).

The two chromosomes may exchange fragments by a process called crossing over.

When the chromosomes partially separate in late prophase, the areas where crossing over occurred remain attached and are referred to as Chiasmata (sing. chiasma). They hold the chromosomes together until they separate during anaphase.

Crossing over between homologous chromosomes is likely to occur at several different points, resulting in chromosomes that are mixtures of the original two chromosomes.

One kinetochore forms on each chromosome instead of on each chromatid as in mitosis.

The spindle fibers attach to the chromosomes and begin to move them to the center of the cell as they do in mitosis.

Answer 4

Prophase is the first process of mitosis when cellular structures called chromatin, become dense and form chromosomes. Chromosomes also begin to move toward the center of s cell. The nuclear membrane breaks down and form what are called spindles which start at the poles of a cell.

Hope this helped!

Answer 5

As opposed to in mitosis, chromosomes in prophase of meiosis pair with their homologs (to form tetrads) and then often undergo crossing-over events (which shuffle the alleles around on the chromosomes and allows for more genetic variation in the gametes).

Answer 6

chromatin condenses into chromosomes and nuclear membrane goes away