#acrosin
- Acrosincarpy — A structural condition or plant morphological anomaly characterized by the fusion, welding, or partial joining of individual carpels or fruits exclusively at their upper (apical) extremities, while the lower portions or bases remain distinct and separate during development.
- Acrosyndesis — A cytogenetic phenomenon or particular type of meiotic synapsis characterized by the pairing, association, or partial fusion of homologous chromosomes exclusively at their distal extremities (telomeres or terminal regions), while the intercalary and centromeric segments remain free and unaligned. This restrictive chromosomal structure directly influences the crossing-over process and the genetic recombination rate within those specific zones.
- Acrosome — A vesicular cellular formation, resembling a specialized lysosome, located as a cap or protective envelope on the anterior portion of the spermatozoon head nucleus. This structural organelle, derived from the Golgi apparatus during spermiogenesis, contains a large amount of potent hydrolytic enzymes (such as hyaluronidase and acrosin) destined to dissolve the outer protective zones of the ovum (zona pellucida) to allow penetration and biological fertilization.