AP BIOLOGY

CELL DIVISION

THE CELL CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A chromatid is attached to a spindle fiber by the
A
nucleolus
B
deep furrow
C
centromere
D
centriole
Explanation: 

Detailed explanation-1: -The two “sister” chromatids are joined at a constricted region of the chromosome called the centromere. During cell division, spindle fibers attach to the centromere and pull each of the sister chromatids to opposite sides of the cell.

Detailed explanation-2: -Answer and Explanation: The sister chromatids attach to the spindle fibers via a structure called the kinetochore. The kinetochore is like a handle on each of the sister chromatids that the spindles can grab onto.

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 in 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: -View this answer. The correct answer: Chromatids that are attached at the centromere are called d) sister chromatids.

There is 1 question to complete.