During which phase do chromosomes line up along the equator quizlet?

The paired chromosomes line up along the equator of the cell. This occurs only in metaphase I. In metaphase of mitosis and meiosis II, it is sister chromatids that line up along the equator of the cell.

Where do chromosomes line up along the equator?

The spindle fibers will move the chromosomes until they are lined up at the spindle equator. Metaphase: During metaphase, each of the 46 chromosomes line up along the center of the cell at the metaphase plate.

In which phase do the chromosomes line up in the middle of the cell quizlet?

Homologous chromosomes line up at the center of the cell (Metaphase=They MEET in the MIDDLE) Equator of cell.

Why do the chromosomes line up in the middle?

In animal cells, the chromosomes line up in the center of the cell. … Therefore, a safety mechanism called the spindle assembly checkpoint ensures that all of the chromosomes have correctly attached to the spindle before chromosome separation begins.

What is it called when chromosomes line up randomly in the middle?

During metaphase of meiosis I, synapsed pairs of homologous chromosomes (known as bivalents or tetrads) are lined up on an imaginary plane in the middle of the cell called the metaphase plate. The chromosomes are attached to spindle fibres at their centromeres.

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What can happen if cells do not duplicate correctly?

The cell cycle controls the four major phases of cell growth and division. … If the cell has not properly copied its chromosomes, an enzyme called cyclin dependent kinase, or CDK, will not activate the cyclin, and the cell cycle will not proceed to the next phase. The cell will undergo cell death.

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