equatorial plate

noun

, Cell Biology.

the central plane of the spindle in a dividing cell, to which chromosomes migrate during the metaphase of mitosis or meiosis.

First recorded in 1885–90

As the amphiaster grows the centrosomes are grouped in a plane at the equator of the spindle, forming the Equatorial Plate.

The four meshes of each equatorial plate egg-shaped, four to six times as broad as the bars.

The four meshes of each equatorial plate circular, only twice as broad as the bars.

Four meshes of each equatorial plate pentagonal, ten to twelve times as broad as the bars.

Fig. 30 shows this central arrangement of the chromosomes, forming what is called the equatorial plate.

April 23, 2024inveterate

[in-vet-er-it ]

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