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Sister in Biological Definition

Chromatid

... chromosome consists of two exactly identical (" sister ") chromatids. After they have been pulled apart ... spindle , chromatids are called "chromosomes". sister chromatids are joined at a point called the ... became two, the two copies are now called sister chromatids, or generally, chromatids. ...

Mitosis

... in the cell. Identical chromosomes (called sister chromosomes) are attached to each other at a DNA ... protein called cohesin acts as a glue joining two sister chromosomes (a.k.a. sister chromatids) along their lengths. When ...

Mitosis

... in the cell. Identical chromosomes (called sister chromosomes) are attached to each other at a DNA ... protein called cohesin acts as a glue joining two sister chromosomes (a.k.a. sister chromatids) along their lengths. When ...

Anaphase

... Anaphase is preceded by metaphase , by the end of which fully condensed sister chromatids are arranged in pairs, their centromeres lying along a surface ... . Separase then cleaves cohesin , the protein responsible for holding sister chromatids together. They immediately separate, marking the cytological ...

Cladistics

... binary (two-way). The two taxa on either side of a split are called sister taxa or sister groups . Each subtree, whether it only contains one item or a hundred ...

Mitotic spindle

... the center of the spindle. Once all the chromosomes are aligned with sister chromatids pointing to opposite ends of the spindle, the sister chromatids separate and are dragged away from each other, ensuring that ...

Prophase

... copies of each chromosome in the cell. Identical chromosomes (called sister chromosomes) are attached to each other at a DNA element present on every ... chromosomes again. The task of mitosis is to assure that one copy of each sister chromatid - and only one copy - goes to each daughter cell after cell ...

Human Genome Project

... of the human DNA is stored in databases and is available for everyone on the Internet . The U.S. National Center for Bioinformatics (and sister organizations in Europe and Japan) houses the genomic sequence, along with sequences of known and hypothetical genes and proteins. Other ...

Louis Pasteur

... , France , the son of a tanner. His parents were Jean Joseph and Jeanne Pasteur and his sisters were Virginie, Josephine, and Emilie Pasteur. His sister Emilie had a sickness that froze her mind and even though she grew to adult size she still had the mind of a five-year old. Louis pasteur went to ...

Marcello Malpighi

... family affairs. He returned to university after two years, and became a doctor of medicine in 1653 . He married Francesca Massari , younger sister of his anatomy professor, the next year. She unfortunately died a year later. Contents showTocToggle("show","hide") 1 Academic career ...

Meiosis

... to two (sister) chromatids, are pulled towards opposing poles. Two haploid sets of chromosomes form at opposing poles. Each chromosome consists of a sister chromatid pair, as aforementioned. Telophase The first meiotic division effectively ends when the centromeres arrive at the poles. Each ...
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