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Terms in this set (23)
Chromatin condenses into chromosomes. Each duplicated chromosome appears as two identical sister chromatids. The mitotic spindle begins to form. The centrosomes move away from each other.
chromosomes align at the metaphase plate.
Sister chromatids separate during anaphase. The chromosomes move to opposite ends.
During which chromosomes duplicate. At the end of this phase, each chromosome consists of two genetically identical sister chromatids attached together.
Centrosome with centriole pairs
A double membrane that surrounds the nucleus in the cell
Clusters of DNA, RNA, and proteins in the nucleus of a cell
Chromatids of homologous chromosomes exchange segments.
structure containing four chromatids that forms during meiosis
Joined copies of the original chromosome
Spiral strands of protein molecules that form a tubelike structure
Plane midway between the two poles of the cell where chromosomes line up during metaphase.
Area where the chromatids of a chromosome are attached
Chromosomes, each composed of two sister chromatids, come together as pairs. The resulting structure, consisting of four chromatids. Crossing over occurs in this phase.
Paired homologous chromosomes line up across the center of the cell
Homologous chromosomes move to the opposite poles of the cell.
Telophase and Cytokinesis
Pairs arrives at poles and cell is pinched apart, separating into two cells.
The first phase of meiosis II, a spindle forms and moves the chromosomes toward the middle of the cell.
In metaphase II, the sister chromatids are arranged at the metaphase plate. Because of crossing over in meiosis I, the two sister chromatids of each chromosome are no longer genetically identical
The kinetochores of sister chromatids attach to microtubules extending from opposite poles
The centromere divides. The chromatids separate and move to opposite ends of the cell. Each chromatid is now an individual chromosome.
Telophase II and Cytokinesis
Nuclei form at the cell poles, and cytokinesis occurs at the same time. There are now four daughter cells, each with the haploid number of (single) chromosomes.
Sister chromatids remain attached
During Anaphase sister chromatids remain attached as they are separated from the other sister chromatids
A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell
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