In ontogenesis, gene according to certain when, the spatial order have the choice expression.
个体发育中, 基因按一定的时 、 空次序有选择地表达.
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英英释义
Noun
1. (biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level;
"he proposed an indicator of osseous development in children"