Cells with a full set of chromosomes are referred to as diploid or 2n, whereas cells with half the chromosomes are haploid or n. At which stage(s) of meiosis I are the cells diploid and at which stage(s) are they haploid

Answers

Answer 1

Answer:

Diploid → Prophase, metaphase, and anaphaseHaploid → Telophase

Explanation:

During prophase I,  chromosomes get condensed. Each of the chromosomes gets in pair with its homologous one. They do so to make the crossing-over possible, a stage where they interchange their parts → 2n

During metaphase I, each of the homologous pairs is driven to the equatorial plane, where they randomly line up → 2n

During anaphase I, occurs the independent separation of homologous chromosomes that migrate to opposite poles of the cell. This separation generates different chromosomal combinations in the daughter cells. There are two alternatives per homologous pair → 2n  

In telophase I, half of the chromosomes are already in one of the poles, while the other half is on the other pole. Each group of chromosomes has now half the number of the original cell. The nuclear membrane forms again in each pole → n

Finally, occurs cytokinesis, which involves the invagination of the cell membrane and cytoplasmic division.

The two new cells are ready for meiosis II.

Answer 2

Mitosis and Meiosis are the two types of cell division, in which the genetic material is replicated and transferred to the daughter cells.

The stages of meiosis in which chromosomes are diploid are prophase, metaphase, and anaphase. The haploid chromosomes are observed in telophase.

Meiosis is a reduction division in which genetic material is halved, such that a reduction in which diploid parent cells give rise to haploid daughter cells.

The stages of meiosis at which chromosomes are diploid and haploid are:

1. Prophase I is the first phase of meiosis I. The chromosomes are condensed and pair with the homologous chromosomes.

2. Metaphase I is characterized by the homologous pairs aligning at the equatorial plane.

3. Anaphase I is the independent separation of chromosomes, which migrate to opposite poles.

4. Telophase I is represented by the separation of chromosomes having a haploid number of chromosomes, which are now segregated into daughter cells.

Therefore, telophase I am the phase in which chromosomes are present in haploid numbers.

To know more about cell division, refer to the following link:

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