Which of the following terms is correctly paired with its description?

Question

Responses

Spindle fibers - the phase where chromatids line up in the middle of the cell
Spindle fibers - the phase where chromatids line up in the middle of the cell

Centriole - cellular organelle that uses spindle fibers to pull sister chromatids apart
Centriole - cellular organelle that uses spindle fibers to pull sister chromatids apart

Sister chromatids - an arrangement of four chromatids that allows for crossing over
Sister chromatids - an arrangement of four chromatids that allows for crossing over

Centromere - where chromatids align during metaphas

Answer 1

The correct pairing based on the descriptions provided would be:

Centromere - where chromatids align during metaphase.

Here’s a brief overview of the other terms to clarify why they are not correctly paired:

• Spindle fibers are structures that help move sister chromatids apart during cell division, particularly during anaphase, not metaphase where they line up.

• Centriole is an organelle that helps in the formation of spindle fibers but it does not pull sister chromatids apart itself; rather the spindle fibers do that.

• Sister chromatids are two identical copies of a chromosome connected at a region called the centromere, not an arrangement of four chromatids. The configuration involving four chromatids is known as a tetrad, which occurs during meiosis when homologous chromosomes pair up.

Thus, the correct pairing is indeed Centromere with where chromatids align during metaphase.