Question

Chromosomal Theory of inheritance was given by
A. Morgan et al
B. Sutton and Boveri
C. Hugo de Vries
D. Gregor J. mendel

Answer 1

The inheritance theory of chromosomes notes that genes are located on chromosomes at particular locations, and that the action of chromosomes during meiosis may clarify the inheritance laws of Mendel. Independent articles have been written proposing what we now call the inheritance theory of chromosomes. This theory notes that on various chromosomes, individual genes are located at particular locations.

Complete answer:
In 1933, Thomas Hunt Morgan received the Nobel Prize in Physiology or Medicine for studies that elucidated the role of the chromosome in heredity. Hugo Marie de Vries was a Dutch botanist and is best known for proposing the notion of genes, rediscovering in the 1890s the laws of heredity, adding the word "mutation" and establishing an evolutionary theory of mutation. The fundamental laws of inheritance were discovered by Gregor Mendel through his work on pea plants.
Inheritance Chromosomal Theory assumes that chromosomes are vehicles of genetic knowledge of Mendelian factors or genes, and it is the chromosomes that during transmission segregate and assort differently from one generation to the next. Walter Sutton and Theodore Boveri independently proposed the Chromosomal Theory of Inheritance in 1902. But Morgan, Sturtevant and Bridges later changed it and extended it.

Hence, the correct answer is option (B).

Note: When he discovered a mutation in a gene affecting fly eye color, Morgan's vital, chromosome theory-verifying experiments began. For his genetic research, Morgan opted for the fruit fly, Drosophila melanogaster. They make up for what fruit flies can lack in charisma (depending on your insect taste) in practicality: they are inexpensive, simple and quick to grow. In a small bottle of sugar sludge at the bottom, you can raise hundreds of them and many geneticists still do this today.