Cynthia observed a cell with a pair of sister chromatids moving toward a given pole as a single unit and another cell with siste
r chromatids moving to opposite poles. What did she infer from her observation? A. The first cell is in anaphase l, and the second cell is in anaphase ll B.The first cell is in metaphase ll, and the second cell is in metaphase l C. The first cell is in anaphase ll, and the second cell is in anaphase l
The answer is A. The first cell is in the anaphase I and the second cell is
in the anaphase II.
Meiosis is a cell division which results in the
reduction of chromosome number by half - from diploid to haploid - in
daughter cells. It consists of meiosis I and meiosis II. Meiosis I produces two
haploid cells. Meiosis II is analogous to mitosis, so in total,
meiosis results in four haploid cells. So, in meiosis there are two anaphases -
the anaphase I in meiosis I and the anaphase II in meisosis II.
<span> </span>
<span>In anaphase I, the sister chromatids separate
from each other to the opposite sides of the cells. In meiosis I there are 46
chromosomes in duplicate, which are present as pairs of sister
chromatids. In anaphase of meiosis II, since the cell is
haploid, there are 23 chromosomes in duplicate, which are
present as sister chromatids.</span>
The end products are also different, in every living organism water and carbon dioxide are produced in aerobic respiration, whereas in anaerobic respiration, animals produce lactic acid, while plants and micro-organisms produce ethanol.
