Question

Genetic variation in a population arises due to
(A) Mutation as well as recombination
(B) Reproductive isolation and selection
(C) Mutation only
(D) Recombination only

Answer 1

Hint: It is a term used to describe the variation in the DNA sequence. Actions that trigger it to happen are - change in the environmental factors UV(Ultra- Violate rays), smoking, DNA is copied. It brings changes to the existing proteins in the body that might be good or bad. It is a process of breaking the pieces of DNA and mixing them to create a new blend.

Complete step by step answer:
- Mutation is an alteration in the genetic material of a cell of a living organism or of a virus that is more or less permanent and that can be transmitted to the cells or the virus descendants.
- Mutation in egg or sperm cells may result in an individual offspring which results in genetic variation which might be beneficial, harmful, or neutral.
- Recombination involves the exchange of genetic material between homologous chromosomes which result in the shuffling of genes creating a new combination of variants in offspring.
So the correct answer is, ”Mutation as well as recombination”.

Additional information:
- Genetic variation is an important process that occurs in all biological lifeforms. Genetic variation refers to diversity in gene frequencies.
- Phenotypic variation majorly derives from Genetic variations.
- Major Genetic variations can be examined through the variations observed at the enzyme level with the aid of protein electrophoresis.
- the raw material for necessary evolutionary changes is sourced through Genetic variations.

Note:
- Eye color, blood type, camouflage in animals, and leaf modification in plants can be called as genetic variation in different species.
- Mutations are unplanned and harmful to organisms. Ultraviolet rays, gamma rays, X- rays, etc are physical mutagens, and nitric acid, hydroxylamine, etc. are chemical mutagens.