Genetics used of a chromosome that is not paired or united with its homologous chromosome during synapsis .

属于一种染色体的，在染色体结合过程中不与它的对等染色体配对或结合的。

Changes in the number and function of synapsis can cause changes in synaptic plasticity, thereby can affect learning and memory.

突触的数量和功能发生改变可引起突触可塑性的改变，进而影响学习记忆能力。