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Put the following steps of Meiosis in the correct order:

I. The cell divides into 2 daughter cells
II. Homologous chromosomes pair up in the center of the cell
III. Spindle fibers separate homologous chromosomes
IV. Chromosomes become shorter and thicker
A. I, II, III, IV
B. IV, III, II, I
C. II, III, I, IV
D. IV, II, III, I

Respuesta :

C.
Because first thing that happens in meiosis is the homologous pairs come in the center of the cell. Without that happening first, the cell can’t divide into 2 daughter cells, so it is NOT option A.
Chromosomes will become shorter and thicker at the end so the only option that remains is C.
  • Homologous chromosomes pair up in the center of the cell.
  • Spindle fibers separate homologous chromosomes.
  • The cell divides into 2 daughter cells.
  • Chromosomes become shorter and thicker.

What is Meiosis

Meiosis  (listen); from Ancient Greek'lessening', since it is a reductional division) is a special type of cell division of germ cells in reproducing organisms that produce the gametes, such as sperm or egg cells. It involves two rounds of division that ultimately result in four cells with only one copy of each chromosome (haploid). Additionally, before the division, genetic material from the paternal and maternal copies of each chromosome is crossed over, creating new combinations of code on each chromosome. Later on, during fertilization, the haploid cells produced by meiosis between a male and female will fuse to create a cell with two copies of each chromosome again, the zygote.

Errors in meiosis resulting in aneuploidy (an abnormal number of chromosomes) are the leading known cause of miscarriage and the most frequent genetic cause of developmental disabilities.

Learn more about Meiosis

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