Satellite means A) Terminal part of chromosome beyond secondary construction B) Terminal part of the chromosome beyond primary construction C) Terminal part of chromosome beyond tertiary construction D) None of the above
Hint: SAT-chromosomes or satellite chromosomes are the chromosomes that contain secondary constructs that serve as identifying. At metaphase in some chromosomes in addition to the centromere, one or more secondary constrictions are observed. These chromosomes are called SAT-chromosomes.
Complete step by step answer: The terminal end of the chromosome present beyond the secondary construction is called SAT-chromosome or satellite chromosome that is attached to the chromosome by a thin thread called chromatin. In humans these chromosomes are usually associated with the short arm of an acrocentric chromosome and Y chromosome contains satellites although these are thought to be translocations from autosomes secondary constriction always keeps its position so it is used as makers to identify specific chromosomes. Satellite means Terminal part of the chromosome beyond secondary construction.
So, the correct answer is “Option A”.
Note: Students the satellite at metaphase looks like it is attached to the chromosome by a thread of chromatin and secondary constriction is associated with the formation of nucleus so it is called as nucleolar SAT-chromosomes. Each dipole nucleus consists of 4 SAT (sine Acido thymonucleico acid)-chromosomes.