Table of Contents
- 1 During which stage of meiosis do the cells go from diploid to haploid?
- 2 In which phase of meiosis does the chromosome number change from diploid to haploid choose the correct answer?
- 3 Which stages of meiosis are diploid?
- 4 What step of meiosis cuts the diploid number to a haploid number?
- 5 What happens to chromosomes at the end of meiosis?
- 6 How are chromosomes divided in telophase I cell?
During which stage of meiosis do the cells go from diploid to haploid?
Only after the first cytokinesis, when the daughter cells of meiosis I are fully separated, are the cells considered haploid. Following this first division, the cell begins meiosis II with prophase II, making this the first haploid meiotic stage.
During which phase of meiosis is the chromosome number reduced?
MEIOSIS
| A | B |
|---|---|
| During meiosis, when is the chromosome number reduced to half the original number? | Meiosis I |
| During what phase of meiosis do similar chromosomes pair up and come near each other? | Prophase I |
| During what phase of meiosis do homologous chromosomes separate? | Anaphase I |
In which phase of meiosis does the chromosome number change from diploid to haploid choose the correct answer?
In which phase of meiosis does the chromosome number change from diploid to haploid? Choose the correct answer. d. anaphase II in meiosis at the end of crossing over.
Which division in meiosis reduces the daughter cells from diploid to haploid?
Meiosis I
Meiosis produces 4 haploid cells. Mitosis produces 2 diploid cells. The old name for meiosis was reduction/ division. Meiosis I reduces the ploidy level from 2n to n (reduction) while Meiosis II divides the remaining set of chromosomes in a mitosis-like process (division).
Which stages of meiosis are diploid?
Prophase I: The starting cell is diploid, 2n = 4. Homologous chromosomes pair up and exchange fragments in the process of crossing over. Metaphase I: Homologue pairs line up at the metaphase plate. Anaphase I: Homologues separate to opposite ends of the cell.
Which cells are diploid in meiosis?
In meiosis, the starting cell is a diploid. The diploid cell divides twice to produce four haploid cells.
What step of meiosis cuts the diploid number to a haploid number?
Meiosis is a process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. Meiosis usually involves two distinct divisions, called meiosis I and meiosis II. By the end of meiosis II, the diploid cell becomes four haploid cells.
During which stage of meiosis would you find a cell with a diploid chromosome number and homologous chromosome pairs are crossed over?
Prophase I
The phases of meiosis I. Prophase I: The starting cell is diploid, 2n = 4. Homologous chromosomes pair up and exchange fragments in the process of crossing over. Metaphase I: Homologue pairs line up at the metaphase plate.
What happens to chromosomes at the end of meiosis?
(See figure below, where meiosis I begins with a diploid (2 n = 4) cell and ends with two haploid ( n = 2) cells.) In humans (2 n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I ( n = 23). During prophase I, chromosomal condensation allows chromosomes to be viewed under the microscope.
How is genetic diversity generated in meiosis I?
Meiosis I is unique in that genetic diversity is generated through crossing over and random positioning of homologous chromosomes (bivalent chromosomes). In addition, in meiosis I, the chromosomal number is reduced from diploid (2n) to haploid (n) during this process.
How are chromosomes divided in telophase I cell?
In telophase I, the homologs of each bivalent arrive at opposite poles of the cell, and a new nuclear membrane forms around each set of chromosomes. Cytokinesis then divides the cell into two daughter cells. Each of the two daughter cells is now haploid (n), with half the number of chromosomes per nucleus as in meiosis I.
How are chromosomes arranged in a diploid organism?
In an organism with two sets of chromosomes, there are four ways in which the chromosomes can be arranged, resulting in differences in chromosomal distribution in daughter cells after meiosis I. (A diploid organism with 2 n chromosomes will have 2 n possible combinations or ways of arranging its chromosomes during metaphase I.)