Answer:
46.
Step-by-step explanation:
Humans are diploid organisms, in which both somatic and sex cells have 23 pairs of chromosomes or 46 chromosomes. However, types of chromosomes are different in sex cells of males and females.
In males, there are 22 pairs of autosomes and the 23rd pair contains one X and one Y chromosome ( represented as 44 + XY), while in females, there are 22 pairs of autosomes and 23rd pair consists of two X chromosomes (represented as 44 + XX).
Thus, the correct answer to be filled in the blank is '46.'