由于遗传型及后生系统 epigenetic system
研究生认为有可能她天生由于遗传因素就易患心脏病。
The researchers suggest that she could have been genetically predisposed to heart problems.
它可能是由于遗传引起的，在出生的时候就表现出来了。
由于遗传资源狭窄，有利重组体的数量受到限制，使育种工作进展缓慢，甚至停滞不前。
Because the heredity resources is narrow, the restrict that the quantity of the beneficial reorganization suffer, make the breeding work progress slowly, even bog down.
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