Tuesday, 1 March 2011

Gr 12 Biology Terms

Genetics & Structures:
Chromosomes: an organized structure of DNA and protein that is found in cells.

Chromatids: two identical copies of DNA making up a duplicated chromosome.

Chromatins: a mass of genetic material composed of DNA and proteins that condense to form chromosomes.

Homologous Chromosomes: chromosome pairs of the same length, centromere position, and staining pattern, with genes for the same characteristics at corresponding loci.

Homologs: a homologous trait, often refer to a homologous protein, and to the gene (DNA sequence) encoding it.

Replicated Chromosome: a replicated chromosome has undergone DNA replication and contains
two sister chromatids.

Unreplicated Chromosome: cell's original number of chrosome (6).

Sister Chromatids the two identical strands of a single replicated chromosome. 

Sister Chromosomes: 2 daughter cells, with its own nucleus and identical chromosomes.

Centromeres: the constricted region joining the two sister chromatids that make up an X-shaped chromosome.

Centrioles: a self-replicating, small, fibrous, cylindrical-shaped organelle, typically located in the cytoplasm near the nucleus in cells of most animals.

Centrosome: the organelle located near the nucleus in the cytoplasm that divides and migrates to opposite poles of the cell during mitosis.

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