登入選單
返回Google圖書搜尋
A STUDY ON PRIMARY AMENORRHEA
Dr. V. LAKSHMI KALPANA
出版Lulu.com, 2017-12-30
主題Education / General
ISBN13874463639781387446360
URLhttp://books.google.com.hk/books?id=P-RFDwAAQBAJ&hl=&source=gbs_api
EBookSAMPLE
註釋In 1956 Tjio and Levan first identified the human diploid chromosome number to be 46. This was later confirmed by Ford and Hemerton in the same year. Then the human male complement was found to be 46, XY and female complement 46,XX. The first chromosomal abnormality, that is the presence of 47 chromosomes in Down's syndrome was reported by Lejeune et al. (1959).