Skip Navigation
The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
Donate Now Get Free Videos

Movie Theater

DNA


From The Biology of Prenatal Development.Buy Now

Script: 受精卵的46个染色体 代表一个新人的 全部遗传蓝图的 第一个版本。 这个总计划居住在 称为脱氧核糖核酸的 紧密盘绕分子中。 它们包含全部身体 发育的指示。

脱氧核糖核酸分子 象一种叫做双螺旋线的 螺旋梯子。 梯子横档的构成成分 为成对的分子 或称为鸟嘌呤的基质、 胞核嘧啶、腺嘌呤和胸腺嘧啶。

鸟嘌呤只与胞核嘧啶配对, 腺嘌呤只与胸腺嘧啶。

All ages referenced to fertilization, not last menstrual period.
See Snapshots   |   Log in to create a playlist
Firm Hand Grasp
Firm Hand Grasp
Ready for Birth
Ready for Birth
DNA
DNA
To the Earth and Back
To the Earth and Back
Fertilization 1
Fertilization 1
Fertilization 2
Fertilization 2
When does health begin? Find out now.
Help give babies a healthy start and a healthy future. Donate now.


Add a Comment

Your Name: Log In 3rd-party login: Facebook     Google     Yahoo

Comment: