Artificial Gene Synthesis Pioneer

The question asks about the scientist who synthesized the first artificial gene. This is a key event in the history of molecular biology and genetic engineering.

Har Gobind Khorana and the First Artificial Gene

The correct answer to who synthesized the first artificial gene is Har Gobind Khorana. His work was monumental in the field of genetics.

• In 1970, Dr. Har Gobind Khorana, along with his research team, successfully achieved the complete chemical synthesis of a functional gene. This gene was specifically the gene that codes for yeast alanine transfer RNA (tRNA).
• This incredible feat demonstrated that DNA could be synthesized outside of a living organism, paving the way for future developments in genetic engineering and synthetic biology.
• Although his Nobel Prize in Physiology or Medicine (awarded in 1968, shared with Marshall W. Nirenberg and Robert W. Holley) was for his work on interpreting the genetic code and its role in protein synthesis, his later work on gene synthesis was a direct application and extension of this fundamental understanding. The synthesis of an artificial gene confirmed many aspects of the genetic code and laid the groundwork for manipulating genetic material.

Contributions of Other Scientists in Genetics

To fully understand why Har Gobind Khorana is the correct answer, it's important to differentiate his contributions from those of the other prominent scientists listed in the options:

• Mendel: Gregor Mendel is widely recognized as the "father of modern genetics." His pioneering work in the mid-19th century involved studying inheritance patterns in pea plants. He formulated the fundamental laws of heredity, including the law of segregation and the law of independent assortment. His research predated the discovery of DNA's structure and the concept of gene synthesis.
• Watson and Crick: James Watson and Francis Crick, in 1953, famously deduced the double helix structure of DNA, building upon the work of Rosalind Franklin and Maurice Wilkins. Their discovery was crucial for understanding how genetic information is stored and replicated, but they did not synthesize an artificial gene. Their work revealed the structure of existing genes.
• Morgan: Thomas Hunt Morgan was a prominent American evolutionary biologist and geneticist. In the early 20th century, he conducted extensive experimental work with the fruit fly, Drosophila melanogaster. His research provided strong evidence that genes are located on chromosomes and are the units of heredity. He also contributed significantly to understanding genetic linkage and gene mapping, but not to the synthesis of artificial genes.

Conclusion on First Artificial Gene Synthesis

Based on historical scientific achievements, Har Gobind Khorana is the scientist credited with synthesizing the first artificial gene, a landmark achievement that opened new avenues in biotechnology and molecular biology.