Final answer:
In a diploid organism with 64 chromosomes in its somatic cells, each of its gametes (reproductive cells) would contain half the number of chromosomes, which is 32 chromosomes.
Step-by-step explanation:
If in a typical organism, a somatic cell (nonreproductive, or 'body' cell) contains 64 chromosomes, that means the organism is diploid, possessing two matched sets of chromosomes in its somatic cells. When it comes to gametes (reproductive cells such as sperm or eggs), these cells are haploid, possessing half the number of chromosomes than are found in somatic cells. Therefore, each gamete of an organism with 64 chromosomes in its somatic cells would be expected to contain 32 chromosomes, hence the answer is B) 32.
Learn more about Chromosomes in Gametes