sperm morphology trait sperm molecular composition trait 2025-05-01T20:22:19Z Any measurable or observable characteristic related to the proportions of proteins, minerals, nutrients, gases, or other substances in the male gamete, which is produced in the testes. Sperm cells play an important role in the process of fertilization, where they fuse with a female gamete or egg cell (ovum) to form a zygote. Trait.ontology VT:0011167