The first division of meiosis in which homologous chromosomes are paired and segregated from each other, occurring in the constitutive absence of chiasmata.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus indicating lowered oxygen tension. Hypoxia, defined as a decline in O2 levels below normoxic levels of 20.8 - 20.95%, results in metabolic adaptation at both the cellular and organismal level.

A cell cycle checkpoint that delays the metaphase/anaphase transition of a mitotic nuclear division until the spindle is correctly assembled and chromosomes are attached to the spindle.

A cell cycle process by which the cell nucleus divides as part of a meiotic cell cycle in the female germline.

The cell cycle process in which genetic material, in the form of chromosomes, is organized and then physically separated and apportioned to two or more sets during the meiotic cell cycle in a female.

The cell cycle process in which genetic material, in the form of chromosomes, is organized and then physically separated and apportioned to two or more sets during a normally chiasmate meiosis under the condition that chiasma have not occurred between a particular pair of homologs. Distributive segregation is a \backup\ mechanism to ensure the segregation of homologs that have failed to cross over - either as a consequence of mutation or not, as, for example, the 4th chromosome of Drosophila melanogaster (which never exchanges, presumably due to its small size) - but nevertheless segregate normally.

The cell cycle process in which genetic material, in the form of chromosomes, is organized and then physically separated and apportioned to two or more sets during a normally chiasmate meiosis under the condition that chiasma have not occurred between a particular pair of homologs. Distributive segregation is a \backup\ mechanism to ensure the segregation of homologs that have failed to cross over - either as a consequence of mutation or not, as, for example, the 4th chromosome of Drosophila melanogaster (which never exchanges, presumably due to its small size) - but nevertheless segregate normally.

Any process that stops, prevents, or reduces the frequency, rate or extent of sister chromatid segregation.

A cell cycle checkpoint that delays the metaphase/anaphase transition of a meiotic cell cycle until the spindle is correctly assembled and chromosomes are attached to the spindle.

The alignment of chromosomes at the metaphase plate, a plane halfway between the poles of the meiotic spindle, during meiosis I.

A cell cycle checkpoint that delays the metaphase/anaphase transition of a meiotic nuclear division until the spindle is correctly assembled and that the chromosomes are attached to the spindle.

Progression through the phases of the meiotic cell cycle, in which canonically a cell replicates to produce four offspring with half the chromosomal content of the progenitor cell via two nuclear divisions.

The self-renewing division of a germline stem cell in the male gonad, to produce a daughter stem cell and a daughter germ cell, which will divide to form the male gametes.

A multisubunit complex that is located at the centromeric region of DNA and provides an attachment point for the spindle microtubules.

The region of a condensed nuclear chromosome kinetochore most external to centromeric DNA; this outer region mediates kinetochore-microtubule interactions.

A structure comprised of a core structure (in most organisms, a pair of centrioles) and peripheral material from which a microtubule-based structure, such as a spindle apparatus, is organized. Centrosomes occur close to the nucleus during interphase in many eukaryotic cells, though in animal cells it changes continually during the cell-division cycle.

The array of microtubules and associated molecules that forms between opposite poles of a eukaryotic cell during mitosis or meiosis and serves to move the duplicated chromosomes apart.