Mutations, often causing conditions like leukemia and lymphoma, are the result of a certain change in non-homologous chromosomes. this type of change is referred to as
a) insertion.
b) inversion.
c) nondisjunction.
d) translocation.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion