What is the structure of telocentric chromosome?

How does the telocentric chromosome look like?

A telocentric chromosome is a chromosome whose centromere is located at one end. The centromere is located very close to the end of the chromosome that the p arms would not, or barely, be visible. A chromosome that has a centromere closer to the end than the center is described as subtelocentric.

What is the structure of centromere?

centromere, structure in a chromosome that holds together the two chromatids (the daughter strands of a replicated chromosome). The centromere is the point of attachment of the kinetochore, a structure to which the microtubules of the mitotic spindle become anchored.

How many chromatids are in Telocentric?

During prophase and metaphase of mitosis, a human will have 46 chromosomes, but 92 chromatids because the original 46 chromosomes were duplicated during S phase of interphase.

What is the structure of telocentric chromosome?

Naturally occurring telocentric chromosomes (telosomes) with a terminal centromere are rare but do exist. Telosomes arise through misdivision of centromeres in normal chromosomes, and their cytological stability depends on the structure of their kinetochores.

What is the main function of centromere?

The primary function of the centromere is to provide the foundation for assembly of the kinetochore, which is a protein complex essential to proper chromosomal segregation during mitosis.

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What causes a dark band on the chromosome?

A karyotype analysis usually involves blocking cells in mitosis and staining the condensed chromosomes with Giemsa dye. The dye stains regions of chromosomes that are rich in the base pairs Adenine (A) and Thymine (T) producing a dark band.

Where can telocentric chromosomes be found?

Telocentric chromosomes are rarely encountered in plants. They are known to occur in taxa like Stangeria, Podocarpus, Welwitschia etc., among gymno- sperms and Allium, Nothoscardum, Oxalis, Tradescantia and a few others in angiosperms.