what are satellites of chromosomes?
Answers
Answer:Satellite chromosomes or SAT-chromosomes are chromosomes that contain secondary constructs that serve as identifying markers. In addition to the centromere, one or more secondary constrictions can be observed in some chromosomes at metaphase. These chromosomes are called satellite chromosomes.
Explanation:
Answer: Satellite is mostly present as the tip of chromosomes and carries the nucleolar organizing region that represent site for nucleolus formation and rRNA synthesis. Secondary constriction is rich in heterochromatin which is highly compact and coiled inactive form of DNA having less DNA and more RNA than euchromatin; option A is correct and B is incorrect. The main difference between euchromatin and heterochromatin region lies in their DNA content, not in protein content; euchromatin is loosely packed DNA with higher gene concentration as compared to heterochromatin which is tightly packed and have less gene concentration, thus less DNA content. That’s why satellite of chromosome, being heterochromatic, contains less DNA.
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