1. 系：这一事件在真哺乳亚纲动物和有袋动物(marsupial)进化上分开后发生,这就表明这两个世系(lineage)的剂量补偿进化机制是独立的. 当哺乳动物从其他的羊膜动物(amniote)中分化出来后不久,哺乳动物的X和Y染色体便从一对常染色体中进化而来[1].

1. 家系；家族；血统
    Someone''s lineage is the series of families from which they are directly descended.

    e.g. They can trace their lineage directly back to the 18th century.
           他们的世系可以直接追溯到18世纪。
    e.g. ...a respectable family of ancient lineage.
           受人尊敬的古老世家

1. inherited properties shared with others of your bloodline

    Synonym: ancestryderivationfiliation

2. the descendants of one individual

    e.g. his entire lineage has been warriors

    Synonym: lineline of descentdescentbloodlineblood linebloodpedigreeancestryoriginparentagestemmastock

3. a rate of payment for written material that is measured according to the number of lines submitted

    Synonym: linage

4. the number of lines in a piece of printed material

    Synonym: linage

5. the kinship relation between an individual and the individual''s progenitors

    Synonym: descentline of descentfiliation