Meiosis

• the cell division in gametes or sex cells wherein the chromosome number of the parent cell is reduced by half?

  Meiosis
• Meiosis is also called as?

  Reductional Division
• the reductional stage wherein the chromosome number is halved?

  Meiosis I
• second round of cell division wherein the halved cells undergo the same procedure?

  Meiosis II
• Prophase I has 5 substages that does not occur in mitosis, which are?

  Leptotene, Zygotene, Pachytene, Diplotene, and Diakinesis
• Thin thread stage; chromatin coils to form chromosomes, made up of two sister chromatids?

  Leptotene
• Made-up of two sister chromatids?

  dyad
• The dyad results from the replication process of single ___ or ___?

  Chromatid or monad
• Paired thread stage; homologous chromosomes pair up in a process of synapsis, then forms bivalent or tetrad chromosomes?

  Zygotene
• In Zygotene, a protein structure that mediates the pairing and their genetic recombination?

  Synaptonemal complex
• Thick thread stage; bivalents that are fully integrated by the synaptonemal complex, also called as crossing over stage, because the non-sister chromatids begin to exchange genetic segments as catalyzed by the recombinase enzyme?


  Pachytene
• it is similar to prometaphase, the second phase of mitosis, except that the chromosomes are in their bivalent form?

  Diakinesis
• the complete dissolution of the nuclear membrane, full formation of the spindle fibers, and the alignment of the bivalents along the equatorial plate of the cell?

  Metaphase I
• the homologous chromosome pairs separate to the opposite poles of the cell due to the contraction of the spindle fibers?

  Anaphase I
• the chromosomes have reached the poles and started to uncoil. The nuclear membrane reappears while the spindle fibers disappear?

  Telophase I
• this extra phase of meiosis i‘s explains the separation of the two parent cells, divided into two daughter cells which will then enter a second round of cell division called meiosis ii?

  Cytokinesis
• Meiosis occurs for the purpose of producing gametes for ___, while Mitosis focuses on the ___ of body cells?

  Sexual reproduction and cellular regeneration
• The average organism gains exactly ___ chromosomes from each mother and father, who individually possess 46 chromosomes?

  23
• If an extra chromosome was passed on, it will lead to the genetic condition named?

  Down syndrome