Final answer:
Fertilization is a true process where haploid gametes from both parents fuse to form a diploid zygote, which eventually develops into a multicellular offspring with a complete set of chromosomes.
Step-by-step explanation:
True, fertilization is the process in which gametes (an egg and sperm) fuse to form a new cell, specifically a zygote.
During this process, the sperm and egg each contribute one set of chromosomes, ensuring that the resulting offspring has one complete diploid set of chromosomes. In sexual reproduction, haploid gametes produced by meiosis combine during fertilization, leading to offspring with the same chromosome number as their parents. The subsequent development of the zygote involves multiple cell divisions before it becomes a multicellular offspring.
Notably, the acrosomal reactions during fertilization help the sperm degrade the glycoproteins protecting the egg, which allows for the transfer of the sperm nucleus to the ovum, culminating in the formation of the diploid zygote.