Glossary of Relevant Genetic and Molecular/Cell Biology

  • Stephen H. Tsang
  • Tarun SharmaEmail author
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 1085)


The basic physical and functional unit of heredity; made up of DNA, they act as instructions to make proteins. There are about 20,000–25,000 genes in humans, with size varying from a few hundred DNA bases to more than 2 million bases. Most genes are the same in all people; less than 1% differ. Each person has two copies of each gene, one inherited from each parent. Each chromosome contains many genes.


Glossary Genetics Cell biology Molecular biology 

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Jonas Children’s Vision Care, Bernard & Shirlee Brown Glaucoma Laboratory, Columbia Stem Cell Initiative-Departments of Ophthalmology, Biomedical Engineering, Pathology & Cell Biology, Institute of Human Nutrition, Vagelos College of Physicians and Surgeons, Columbia UniversityNew YorkUSA
  2. 2.Department of Ophthalmology, Columbia UniversityEdward S. Harkness Eye Institute, NewYork-Presbyterian HospitalNew YorkUSA

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