Which among the following will occur more than one and less than five ...
Answer:
Introduction:
Chromosomes are thread-like structures found in the nucleus of eukaryotic cells that carry genetic information in the form of genes. Chromosomes are made up of DNA and proteins that help to organize the DNA into a compact structure. Each chromosome contains multiple regions that serve different functions, including the centromere, telomere, chromomere, and chromatid.
More than one and less than five:
Out of the four regions mentioned above, only one region occurs more than one and less than five times in a chromosome. The region that fulfills this criterion is the chromatid.
Chromatid:
A chromatid is one-half of a replicated chromosome. During cell division, chromosomes are replicated and each replicated chromosome consists of two identical chromatids. The chromatids are held together by a structure called the centromere.
Chromomere:
A chromomere is a localized thickening of a chromosome that represents a region of condensed chromatin. Chromomeres are found only in the chromosomes of eukaryotic cells during cell division and are important in the formation of the characteristic banded appearance of chromosomes. The number of chromomeres in a chromosome varies depending on the species and the stage of cell division.
Centromere:
The centromere is a region of a chromosome that connects the two sister chromatids and is responsible for the separation of the chromatids during cell division. The centromere is also the site of attachment for spindle fibers that pull the chromatids apart.
Telomere:
The telomere is a region of repetitive DNA at the end of a chromosome that serves to protect the chromosome from degradation and from fusion with neighboring chromosomes. The telomere also plays a role in the regulation of gene expression and in the aging process.
Conclusion:
In conclusion, only the chromatid occurs more than one and less than five times in a chromosome. The chromomere occurs multiple times, but the number varies depending on the species and the stage of cell division. The centromere and telomere occur only once in a chromosome.
Which among the following will occur more than one and less than five ...
Chromatid
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.