Question

The human chromosome number i. E. 46 were discovered by
A) Mendel
B) Flemming
C) Tijo and levan
D) Watson and crick

Answer 1

Human has the total number of 46 chromosomes that is 23 pairs. There is an experiment carried out by different scientists to determine the number and nature of the chromosomes and the DNA.

Complete answer:
1. There are different chromosome numbers in different species, for humans many experiments were carried out to determine the number of chromosomes.
2. In 1882 a scientist named Flemming carried out an experiment that observed the human chromosomes for the first time under an electron microscope.
3. After this experiment there was a great confusion regarding the number of the chromosomes some scientists said there are 48 chromosomes in one human cell whereas some of them said there are 22 pairs of chromosomes in a human cell
4. All these experiments were not accepted for the long term as they do not have any proper proof regarding their result.
5. After all these in 1956 Tijo and levan performed an experiment and established that the number of chromosomes in a human cell is 46 or 23 pairs of chromosomes and gave proof to support their experiment.
So, Tijo and le van are the scientists who discover that the human chromosomes are 46 in number.

So, the correct answer is “Option C. Tijo and levan”.

Note:
1. Mendel is known as the father of genetics; he performs various experiments on the pea plant to discover various genetic combinations.
2. He is the one who told us about the genes that present on the chromosomes and these genes are responsible for the characters that we have observed physical