The chromosomes line up in pairs along the centrally located, platelike but invisible equator of the cell.
One homologous chromosome from each pair migrates to a pole (one of two invisible points toward each end of the cell wall). Unlike anaphase of mitosis, there is no separation of chromosome strands at the centromeres.
The chromosomes at the poles begin to become organized into two new nuclei, but since they almost immediately go into prophase II, nuclear envelopes do not normally form.
Chromosomes become shorter and thicker
Chromosomes of each group become aligned along their respective invisible equators.
The chromatids now separate longitudinally at their centromeres and migrate to opposite poles.
A nuclear envelope becomes organized around each group of chromatids that, despite consisting of single strands, are now called chromosomes again. At the same time, the chromatids uncoil, becoming longer and thinner and eventually become too diffuse to be distinguished from one another. Nucleoli appear, and the cell walls usually form so that at the completion of meiosis, there are four daughter cells, each with half the original number of chromosomes.
In which phase of meiosis does cross-over occur?
In which phase of meiosis do the chromatids of the chromosomes separate completely from one another?
In which phase of meiosis does a nuclear envelope become organized around each group of chromatids?
What are chromosomal homologues (homologous chromosomes)?
What is a cell equator?
An invisible line in the middle of the cell where the chromosomes meet.
Which phase of meiosis takes the longest to complete?
What name is given to the haploid phase of a sexual life cycle?
The change from a gametophyte to a sporophyte generation occurs as a result of?
What is the first cell of a sporophyte generation called?
How many sets of chromosomes are present in each cell of a sporophyte generation?
How many divisions of the nucleus or cell occur during meiosis?
What term is applied to the exchange of parts that may occur between pairs of chromosomes in the early stages of meiosis?
When one cell undergoes meiosis, how many cells are there at the completion of the process?
At which stage of meiosis do the two strands of each chromosome separate and migrate to opposite poles?
What is a centromere?
A constricted area that holds together two strands of chromosomes
A spore is normally the first cell of which generation?
Fertilization occurs when which cells unite?
How many sets of chromosomes does a sporocyte have?
To which generation does a zygote belong?
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