The half-life of a radioisotope is the time it takes for the radioisotope to become an isotope with one-half of the atomic weight of the original radioisotope. the time it takes for the radioisotope to lose one-half of its neutrons. the time it takes for the radioisotope to become an isotope with one-half the atomic number of the original radioisotope. the time it takes for one-half of the sample to decay. one-half of the time it takes for the radioisotope to completely decay to a nonradioactive isotope.

b

explanation:

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'

it is called the mitotic spindle