DNA is the genetic material in all except certain viruses. In Prokaryotic cells, DNA occurs in the cytoplasm and is the only component of the chromosomes. Whereas, in Eukaryotic cells, DNA is largely confined to the nucleus. Do you know, A human DNA contains 3 billion chemical letters. Yes, it is true. There are several other amazing and fun facts about DNA that we don’t know.
In recent times, the people of India have been heard talking about gene sequencing, gene editing, gene sequencing, and many other similar terms. It seems like, they are now getting introduced to the idea and principle behind personal genomics. Continue reading Personal Genomics: Gene Sequencing & Analysis in India.
A most common and important source of genetic variability is known to be present uniformly throughout the genome is termed Single Nucleotide Polymorphisms or SNPs. Interest in SNPs lies in the fact that these polymorphisms may be responsible for the differences in disease susceptibility, drug metabolism and response to environmental factors between individuals. Even, if they are not directly responsible for the disease, they serve as genetic markers for a nearby locus that might be responsible. Continue reading What are SNPs? Why are Scientists interested in them?
The discovery that genetic information is coded along the length of DNA was one of the major achievements of science in the 20th century. This polymeric molecule, DNA, is the chemical basis of heredity and is the fundamental units of genetic information.
Continue reading Who discovered that DNA is the Genetic Material?
Gregor Johann Mendel was the first to visualize a gene as a discrete, stable particulate unit of inheritance in 1865. He called it a factor and postulated that the offspring receive some specific factors from their parents which make parents characters to appear in the offspring. The term “Gene” was introduced by Johansson in 1909 for a unit of heredity located at a specific site, the locus, in a chromosome. Continue reading What are Genes?