3 词条主页 > 词条 > 拉丁美洲西班牙语 (XL) > freemartin
freemartin
A condition occurring in dizygotic twins of different sexes in cattle (and occasionally other species), when anastomoses of placental vessels permit interchange of hormones and cells during fetal life. The female calf is a sterile intersex due to passage of androgens from the male, and both calves are blood cell chimeras with immune tolerance, due to interchange of cells in utero.
0
0
完善词条
您想要说什么？
新闻词条
精选词条
cobra
A highly venomous snake from the elapidae family native to Asia and Africa. When alarmed, a cobra raises its head and expands the skin of the neck to ...