Translation is the synthesis of a polypeptide using the information in the mRNA. During this stage, there is a change in language: The cell must translate the nucleotide sequence of an mRNA molecule into the amino acid sequence of a polypeptide. The sites of translation are ribosomes, molecular complexes that facilitate the orderly linking of amino acids into polypeptide chains.
作者： Molly
您教我写字，我教您用手机——“银花灿烂”公益项目
Transcription is the synthesis (production) of RNA using information in the DNA. The two nucleic acids are written in different forms of the same language, and the information is simply transcribed, or “rewritten,” from DNA to RNA.
Watson and Crick’s model predicts that when a double helix replicates, each of the two daughter molecules will have one old strand, from the parental molecule, and one newly made strand.
The elegant double-helical structure of deoxyribonucleic acid (DNA) shook the scientific world when it was proposed in April 1953 by James Watson and Francis Crick. The DNA you inherited from your parents contains all your genes—your genetic information.
优秀海报作业展示：Chemistry of Life, Cell Structure and Function, Cellular Energetics.
失败和挫折是人生的一部分，它们让我们更加深刻地认识自己，也让我们更加珍惜成功的时刻。泪水不代表脆弱，而是勇敢面对挑战后的释放。你们已经做得很好了，现在，是时候抬起头，擦干眼泪，继续前进。
Chromosomal inheritance can result in mutations that increase genetic diversity but can also cause genetic disorders. Sexual reproduction can increase genetic diversity by creating offspring with extra or missing chromosomes.
Another departure from simple Mendelian genetics arises when the phenotype for a character depends on environment as well as genotype.
In the 1900s, geneticists extended Mendelian principles not only to diverse organisms, but also to patterns of inheritance more complex than those described by Mendel.
