An intron is a nucleotide sequence found within the genes and is removed via RNA splicing when a mature RNA molecule is being generated; on the other hand, an exon is a nucleic acid sequence present in a mature messenger RNA molecule. Basically, introns are DNA bases found in between exons while exons can be described as DNA bases which are translated to mRNA.Know More
Both introns and exons are parts of genes. They were independently discovered by Phillip Sharp and Richard Roberts in 1977. Introns are mostly found in multicellular eukaryotes, like humans. They are rarely found in unicellular eukaryotes like yeast.
Since introns are less conserved, their sequence tends to rapidly change over time. Exons are more conserved, meaning their sequence remains unchanged over time or in between the species. An exon is a part of the gene responsible for coding amino acids while introns do not take part in protein coding. Therefore, introns are non-coding areas whereas exons are coding areas.
Introns are found within the gene while exons are always found at the ends of a gene. Exons are the only parts of the gene nucleotide sequence that are expressed in the protein; introns are silent and are not expressed because they interfere with exons.Learn more about Molecular Biology & DNA
The chemical factors that determine traits are called genes. With the exception of less than 1 percent of genes, the rest of the genes in people are the same.Full Answer >
Genetic variation generally refers to the differences in genes between individual members of a population, or the frequency in which the various gene types are expressed. Genetic variation is incredibly important for the survival and adaptation of a species, as it helps in terms of natural selection and evolution.Full Answer >
Genetic manipulation, also called genetic engineering, refers to the alteration of the genes of an organism. It involves manually adding new DNA to an organism to add new traits. Examples of genetically engineered organisms include plants that are resistant to certain insects, plants that tolerate herbicides and crops with altered oil content.Full Answer >
Gregor Mendel was a pioneer in genetics; he discovered the laws of inheritance, which showed genes come in pairs and are inherited from each parent. He worked with over 10,000 pea plants over eight years, noting dominant and recessive traits.Full Answer >