Question

________ is called the unit of recombination.
A. Recon
B. Cistron
C. Muton
D. Neutron

Answer 1

Hint: Chromosome has the genetic material on them which is condensed in the cell’s nucleus. Sometimes there is an exchange of genes which lead to recombinant species. They are different from their parents. The mutations in them can also cause recombinants.

Complete answer:
Recombination means the integration of different types of genes to give a progeny that is a mixture of the parents.
There are various units made to measure the distance between the chromosomes to know the possibility of the recombinations. These were mostly coined by S. Benzer

Let us learn about the other units.
> Option A: Recon: It is the elementary unit for genetic recombination. It is the distance between two points on a chromosome. It is the minimum distance in which the recombination is possible. This term was given by S. Benzer in 1957.
> Option B: Cistron: It forms the unit of function. A cistron indicates a segment of the DNA molecule, which controls the cellular functions.
> Option C: Muton: It is the smallest unit of the chromosome. It can be changed by the mutations. It is a commonly used term in genetics.
> Option D: Neutron: It is a subatomic molecule which has no electric charge. It is greater than protons and electrons.

Hence, the correct answer is option (A).

Note: The DNA that is capable of undergoing recombination and crossing overs is measured in recon. Recombination can occur naturally or can be induced by external factors which will cause mutation. They can be passed on to the next generations.