10. What are the primary and
the secondary constrictions of
a chromosome? What is the
other name given to the
secondary constriction?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Primary constriction is narrower
region of condensed chromosome
where centromere, the structure
unites identical chromatids,
located. Secondary constriction a
region similar the primary
constriction, than the normal
of the chromosome , and
in general is related to that
coordinate the of the
nucleolus control the ribosomic
(rRNA) synthesis. For reason the
secondary (that can beone
more in chromosome) called
nucleolus organizer (NOR).