Question

Chromosome theory of inheritance was proposed by
A) Sutton (1902)
B) Boveri (1902)
C) Both Sutton (1902) and Boveri (1902)
D) Correns (1909)

Answer 1

Hint:By observing sea urchins and grasshoppers, the work was done. The other term for the theory is the persons' collective identities.

Complete answer:
First we should know about chromosome theory of inheritance to answer this question. Long after Mendelian genetics, the Chromosomal Theory of Inheritance came into use. During Mendel’s experiments, such radical improvements in their scientific theories were not acceptable to society. The presence of such distinct variables as genes that would segregate without combining could not be assumed by them, as this did not help their understanding of the constant changes leading to evolution. In addition, at that time the means of communication were weak, as a result of which information could not be communicated to the masses. Mendel's statistical method for proving biological laws was also inappropriate.
Now, let us find the solution from the options-
Boveri was researching sea urchins, where he noticed that for proper embryonic development to take place, all the chromosomes must be present.
The work of Sutton with grasshoppers revealed that chromosomes exist in paired pairs of maternal and paternal chromosomes that divide during meiosis and "can form the physical foundation of the Mendelian inheritance law."
When the cells were separated, Sutton and Boveri noticed the actions of the chromosomes. This task became clearer with the advances in the microscope. Therefore, with the aid of chromosomal movement, they proved Mendel’s laws. During the cell division Anaphase, they demonstrated the isolation of the chromosomes. Combined with the Mendelian principles, the concept of chromosomal segregation gave rise to the chromosomal inheritance theory. Boveri-Sutton chromosome theory or chromosome inheritance theory, or, is a basic genetic unifying theory that describes chromosomes as genetic material carriers.
Vries, Correns and Tschermak scientists identified chromosomes that resided within the nucleus.

Thus, the correct answer is option (C) Both Sutton (1902) and Boveri (1902).

 Note:The research was further carried out and illustrated by T.H. Morgan, who used Drosophila melanogaster to explain how variations are contributed by sexual reproduction. Morgan found that two genes did not segregate as per Mendel’s law when crossing a set of features.