生殖细胞系 说的是跟生殖细胞有关的细胞系。 In biol360问答ogy and genetics, the germline of a matur好e or developing individual is the line (sequence) of germ ce代切混督慢严挥团件lls that have genetic material that may be passed to a child. For example, sex ce牛汽临洋载力lls such as the 养那式容配绝sperm or the egg, are part of the germline. 随任证督So are the cells 李劳协that produce sex cells, called gametocytes, the cells that produce those, called gametogonia, and all the way back to the zygote, the cell from which the individual developed. Cells that are not in the germline are called somatic cells. For example, all cells of the mammalian liver are somatic. If there is a mutation or other 守血飞务镇布化案指族genetic change in the germline, it can be passed to offspring, 做but a change in a somatic cell will not be. Germline cells are immortal, in the sense that they can reproduce indefinitely. This is largely due to the activity of the enzyme known as telomerase. This enzyme extends the telomeres of the chromosome, pre波脱根奏困题冷功搞否生venting chromosome fusions and other negative effects of shortened telomeres. Most s装吸omatic cells, by comparison, can only divide aroun倒呢武零虽婷d 30-50 times due to the Hayflick limit. Certain somatic cells, known as stem cells, also expre括ss telomerase and ar责金具队意松失送坏贵e potentially immortal [1]. Not all multicellular organisms differentiate cells into somatic and ge故半亚剂南唱易消rm lines. Notably, plants have no germlin操倍诉影e cells sepa益信要然任调起映rate from stem 角专病急团项担曲含cells. Ger采严假mline can refer to a lineage of cells spanning many generations of individuals-for example, the germline that links any living individual to the hypothetical first eukaryote of about 2 billion years ago, from which all plants and animals descend.