The ..... is a part of a chromosome that links the sister chromatids or dyads. The spindle fibers attach to it during mitosis ..... is the organelle where all the cell microtubules get organized.They occur only in animal cells.

CELL DIVISION AND CANCEROUS CELLS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

The ____ is a part of a chromosome that links the sister chromatids or dyads. The spindle fibers attach to it during mitosis ____ is the organelle where all the cell microtubules get organized.They occur only in animal cells.

A	centrosome, centromere
B	centromere, centrosome
C	centromere, nucleus

Explanation:

Detailed explanation-1: -The centromere appears as a constricted region of a chromosome and plays a key role in helping the cell divide up its DNA during division (mitosis and meiosis). Specifically, it is the region where the cell’s spindle fibers attach.

Detailed explanation-2: -The two “sister” chromatids are joined at a constricted region of the chromosome called the centromere.

Detailed explanation-3: -Spindle fibers from one side of the cell attach to one of the sister chromatids. The spindle fibers from the other side of the cell attach to the other sister chromatids of the chromosome. They attach at a point called the kinetochore, which is a disk or protein that is on each side of the centromere.

Detailed explanation-4: -Metaphase. During metaphase, spindle fibers attach to the centromere of each pair of sister chromatids (see Figure below). The sister chromatids line up at the equator, or center, of the cell. This is also known as the metaphase plate.

Detailed explanation-5: -Spindle fibres attach to kinetochore of chromosomes during metaphase.

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