这种可遗传性的突变会在所有的细胞中得到表达[5]，不过问题是：为什么它只有鸡脖附近表达？

An inherited mutation of this sort will, however, be present in all cells, so the question is: why does it express itself only in the chicken's neck?

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作为繁殖行为的一种表现形式，婚配制度是通过长期进化而形成的，具有种属特异性及可遗传性。

Mating systems, as the expression of breeding behaviors, resulted from evolution with species specific aspects and hereditability.

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表遗传学是研究在DNA序列没有改变的情况下，所发生的可遗传性基因表达的改变，其中DNA甲基化是研究最多、最深入的一种表遗传学表达机制。

Epigenetics is the study of genetic changes in gene expression without the sequence change of DNA, in which DNA methylation is one of the most widely studied epigenetic mechanism.

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