Question

In: Biology

An organism is described as 2n = 28. How many chromosomes are in one meiotic cell...

An organism is described as 2n = 28.

How many chromosomes are in one meiotic cell during anaphase 2?

An organism is described as 2n = 28.

How many chromosomes are in one meiotic cell during metaphase 1?

Solutions

Expert Solution

An organism described as 2n = 28 means each of the body cells and the germ cells contains 28 number of chromosomes.

We know that after the completion of meiosis four offspring cells(gamete) are produced and each cell contains 'n' number of chromosomes. The mother cell goes through two consecutive division, meiosis I and meiosis II. Meiosis I is known as reductional division hence each of the two cells after meiosis I contains 'n' number of chromosomes. Meiosis II is known as equal division so there will be no change in chromosome number after completion of anaphase II stage of meiosis II. But at the time of anaphase II each sister chromatids are separated and form '2n' number of chromosomes at that time. So the number of chromosomes during anaphase II will be 2n = 28 in each of the two meiotic cells.

The stage metaphase aligns the chromosomes on the equatorial line of the cell. The meiotic cell is not completely divided during metaphase I, so it carries same number of chromosome like mother cell 2n = 28.


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