Question

define primary constriction and secondary constriction and kinetochore​

Answer 1

Answer:

Secondary constrictions are the constricted or the narrow region found at any point of the chromosome other than that of centromere (primary constriction). The difference between the two constrictions can be noticed during anaphase, as chromosomes can only bend at the site of primary constriction

Answer 2

Primary constriction is present in all chromosomes . But secondary constriction is not present in all chromosomes. Secondary constriction is also known as nucleolar organizer region as NOR is involved in the formation of nucleolus.....