Human reproduction vocabulary: What is the correct term for the event when the nucleus of a sperm cell fuses with the nucleus of an egg cell to form a zygote?

Question

Accepted Answer

Introduction / Context: Precise terminology is important in reproductive biology. Several steps occur from mating to pregnancy; only one term refers specifically to the fusion of gamete nuclei to form a zygote. Given Data / Assumptions: Sperm and egg nuclei join to create a diploid zygote. The question asks for the exact biological term for nuclear fusion of gametes. Concept / Approach: The correct term is fertilisation (also called syngamy or karyogamy, depending on emphasis). Other listed words describe broader processes or different stages and are not specific to nuclear fusion. Step-by-Step Solution: Identify the event: gamete nuclear fusion.Map to terminology: fertilisation (syngamy) creates a zygote.Exclude general or behavioral terms (sex, intercourse, reproduction) and implantation. Verification / Alternative check: Standard texts define fertilisation as the union of male and female gametes to form a zygote. Why Other Options Are Wrong: Sex / Intercourse: behavioral acts, not the nuclear event itself.Reproduction: overarching biological process, too broad.Implantation: later event when the blastocyst embeds in the uterine lining. Common Pitfalls: Using everyday language instead of precise biological terms. Final Answer: Fertilisation.

Animal Breeding and Transgenic Animal Questions