Meiosis II is the second round of cell division in the process of meiosis or the creation of gametes (sex cells). Directly after meiosis I, the two haploid daughter cells with extra chromosome copies undergo meiosis II, so that the sister chromatids, or identical chromosome copies, can be split evenly to produce four haploid daughter cells. This means that after meiosis I the two daughter cells do not re-enter interphase and no duplication event occurs between meiosis I and meiosis II. Some cells may go through a brief period between these two parts of meiosis called interkinesis.
The stages that make up meiosis II are the same as those in meiosis I and mitosis, except that they contain the roman numeral “II” after each stage. They are as follows:
Prophase II
Metaphase II
Anaphase II
Telophase II and cytokinesis.
During prophase II, as in mitosis and meiosis I, the following steps occur:
During metaphase II, the chromosomes align in a single line at the metaphase plate. In this stage of meiosis, the sister chromatids are preparing to be separated.
During anaphase II the spindle fibers, connected at the kinetochores of each chromatid, pull the chromatids to opposite cell poles. The spindle fibers not connected to a chromatid help push the centrosomes of the opposite poles.
During telophase II, the two cells are preparing to become four after the sister chromatids are separated in anaphase II and the genetic material corresponding to each cell is at opposite poles. In this stage of meiosis II, the chromosomes are decondensing as the nuclear envelope reforms, making the nuclei of the future independent cells. Spindle fibers break down and the centrosomes disassemble. Finally, in telophase II, the cleavage furrow (in animal cells) begins to form as the cells prepare for cytokinesis.
JOIN OUR TELEGRAM CHANNELS | ||
Biology Quiz & Notes | Physics Quiz & Notes | Chemistry Quiz & Notes |
By Team Learning Mantras
TNPSC Civil Services Exam Notification: The Tamil Nadu Public Service Commission (TNPSC) has Announced Notification…
Best Books for RRB Technician Exam: The Railway Recruitment Board conducts the RRB Technician Exams.…
RRB Technician Result: The Railway Recruitment Board announces the RRB Technician Result within a month…
RRB Technician Admit Card: The Railway Technician Admit Card will be released by the Railway…
RRB Technician Salary: The RRB Technician Grade Pay is 1900 and Basic pay is 19900+HRA…
RRB Technician Study Materials: The Railway Recruitment Board conducts the RRB Technician Exams. Government of India,…
This website uses cookies.