1. Tardigrade
  2. Question
  3. Biology
  4. Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres

Q. Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres

 4120  189 AIPMTAIPMT 2012Cell Cycle and Cell Division Report Error

Solution:

During anaphase I, from each tetrad two chromatids of a chromosome move as a unit (dyad) to one pole of a spindle, and the remaining two chromatids of its homologue migrate to the opposite pole. Thus, the homologous chromosomes of each pair, rather than the chromatids of a chromosome, are separated. As a result, half of the chromosomes, which appear in early prophase, go to each pole. Thus the paternal and maternal chromosomes of each homologous pair segregate during anaphase 1 independently of the other chromosomes.