果蝇的性别决定再讨论

果蝇的性别是在性型结构和性基因数量的双重作用下 ,由有效数量大的X基因或Y基因决定性别 .各种性型的X基因与Y基因的有效数量的比率———性指数X/Y和Y/X :为 1.0时 ,发育为中性蝇 ;小于和等于 2 .0时 ,发育为异常雌蝇和异常雄蝇 ;等于和大于 2 .0时 ,发育为正常雌蝇和正常雄蝇 ;等于和大于 3 .0时 ,发育为超雌蝇和超雄蝇

On Identifying the Sex of a Fruit Fly

Influenced by the structures of sexual patterns and the amount of sexual genes, the sex of a fruit fly is decided by Gene X and Y of the effective amounts, When the rate of various patterns of Gene X and Y of effective amounts—— the index X/Y and Y/X, is equal to 1.0, the fruit fly will develop to be of the neutral sex; when below or equal to 2.0, it will develop into an abnormal female or male fly; when equal to or beyond 2.0, it will be normal female or male fly; when equal to or beyond 3.0, it will be a super female or male fly.