The joining of the male gamete with the female gamete is called fertilization. This process

occurs in the oviduct and result into the formation of the zygote. When can we say that the
process of fertilization is complete?
A. when the sperm enters the female oviduct
B. after depolarization of the egg’s plasma membrane
C. when sperm enters the ovum by digesting a path through the corona radiata and
zona pellucid
D. when 23 chromosomes in the sperm have joined with 23 chromosomes in the
ovum

D. when 23 chromosomes in the sperm have joined with 23 chromosomes in the ovum

Once the genetic material from the sperm and the egg have combined to form a zygote with a total of 46 chromosomes (23 pairs), we can say that the process of fertilization is complete.