Question

During meiosis, homologous sets of four chromatids are lined up along the cell's equator, attached to spindle fibers. Which of the following processes will happen next?
A) Anaphase 1
B) Telophase 2
C) Prophase 1
D) Metaphase 2

Answer 1

Answer:

A) Anaphase 1

Explanation:

In sexual reproduction, Meiosis is a nuclear division of diploid cells that results into haploid cell. In Meiosis 1, the stages involved in the process include;

Prophase I

Prometaphase I

Metaphase I

Anaphase I

Telophase I  

In prophase I, the chromosomes condense and it visibility is vivid inside the nucleus. When nuclear envelope starts to break down, homologous chromosomes move closer together.

The important role in prometaphase I is the formation of the spindle fiber in which the spindle fiber microtubules attach to the kinetochore proteins at the centromeres.

During metaphase I, homologous sets of four chromatids  (tetrads) move and orient themselves  to the metaphase plate with kinetochores facing opposite poles. Followed by a kind of random orientation of  homologous pairs at the equator.

This stage is followed by Anaphase I where  microtubules slightly pull the chromosomes that are attached together apart. Though, the sister chromatids remain tightly bound together at the centromere. Also, the chiasmata are broken in anaphase I , as well as the microtubules attached to the fused kinetochores pull the homologous chromosomes apart.

This process of meiosis I ends in  telophase I, where the separated chromosomes arrive at opposite poles.

From the concept of meiosis I explanation, we can arrive at a conclusion that Anaphase I follows the process where  homologous sets of four chromatids are lined up along the cell's equator, attached to spindle fibers.

Answer 2

A) anaphase. It's when the pairs of chromosomes are pulled apart by spindle fibers.