Final answer:
The statement is true; a zygote receives one set of chromosomes from each parent, resulting in a diploid cell with a complete set of genetic material.
Step-by-step explanation:
The statement, "At fertilization, the zygote has one member of each chromosome pair from its sire and the other member from its dam," is True. During fertilization, a sperm and an egg, which are both haploid cells containing a single set of chromosomes, combine to form a zygote. This newly formed cell is diploid, meaning it contains two sets of chromosomes, with one set coming from each parent. Consequently, the zygote inherits one set of 23 chromosomes from the mother's egg and a complementary set of 23 chromosomes from the father's sperm, resulting in the normal diploid number of 46 chromosomes in humans.