Table of Contents
- 1 What happens during the meiotic division?
- 2 What happens after the first meiotic division?
- 3 Which of the following are formed by meiotic division?
- 4 What is the correct order of these meiotic events?
- 5 During which stage of meiosis does the homologue separation occur?
- 6 What are the 4 stages of the cell cycle?
- 7 Where does the process of meiosis take place?
- 8 How does recombination take place in a meiotic cell?
What happens during the meiotic division?
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell.
What happens after the first meiotic division?
Two haploid cells are the end result of the first meiotic division. The cells are haploid because at each pole, there is just one of each pair of the homologous chromosomes. Therefore, only one full set of the chromosomes is present.
What is the main consequence of the first meiotic division?
The result of the first cell division is two independent cells. One cell contains the maternal homologous pair, or sister chromatids, with a small segment of the paternal chromosome from crossover.
What does the first meiotic division produce?
The first division produces a daughter cell, and a much smaller polar body which may or may not undergo a second division. In meiosis II, division of the daughter cell produces a second polar body, and a single haploid cell, which enlarges to become an ovum.
Which of the following are formed by meiotic division?
The first maturation division is reductional (Meiosis-I), which divides the primary spermatocyte into two haploid daughter cells called secondary spermatocytes. The latter undergo second maturation division (Meiosis-II) to form four haploid spermatids.
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 the result of the second meiotic division meiosis?
The result of meiotic division II is four haploid cells.
Where does the meiotic division take place in?
Meiosis I is a unique cell division that occurs only in germ cells; meiosis II is similar to a mitotic division. Before germ cells enter meiosis, they are generally diploid, meaning that they have two homologous copies of each chromosome.
During which stage of meiosis does the homologue separation occur?
In anaphase I, the homologous chromosomes are separated.
What are the 4 stages of the cell cycle?
In eukaryotes, the cell cycle consists of four discrete phases: G1, S, G2, and M. The S or synthesis phase is when DNA replication occurs, and the M or mitosis phase is when the cell actually divides. The other two phases — G1 and G2, the so-called gap phases — are less dramatic but equally important.
What happens during Leptotene?
During leptotene stage, chromosomes begin to condense; during zygotene stage, homologous chromosomes pair; and during pachytene stage, synapsis is complete and crossing-over and homologous recombination take place. Finally, during diplotene stage, chromosomes are unsynapsed and, subsequently, the cell divides.
During which stage of meiosis does the homologue separation occur quizlet?
Anaphase I occurs in a haploid cell while anaphase II occurs in a diploid cell. C) Sister chromatids separate during anaphase II while homologous chromosomes separate during anaphase I.
Where does the process of meiosis take place?
The process of meiosis happens in the male and female reproductive organs. Just like in mitosis, a cell starts meiosis in interphase. In interphase, the DNA is copied, the cell grows and the organelles are copied too.
How does recombination take place in a meiotic cell?
For recombination, meiosis requires that homologous chromosomes are properly paired and aligned by the induction of DNA double-strand breaks by the enzyme SPO11 during the prophase of the first meiotic division. Meiotic cell division also reduces (halves) the chromosomal content.
Why is meiosis 1 also known as reductional division?
In meiosis 1 two diploid daughter cells are produced, whereas, in meiosis 2 four haploid daughter cells are produced. Why is meiosis 1 also known as reductional division? Meiosis 1 is known as reductional division because in this process the number of chromosomes is reduced to half, i.e., from diploid to haploid.
How many daughter cells are produced during meiosis?
There are two stages or phases of meiosis: meiosis I and meiosis II. Before a dividing cell enters meiosis, it undergoes a period of growth called interphase. At the end of the meiotic process, four daughter cells are produced.