Define and explain Variations with examples.

1.	Define and explain Variations with examples.
Answer» Variations: Differences in characters within very closely related groups of organisms are referred to as variations. (OR) Differences among living beings are called variations. Ex: 1. 1. Earlobes in some humans are free and in others attached. 2. Colour of eyes (cornea) in some people are blue and in others black. 3. Colour of skin is black or white. Variation is defined as the change which can be observed at the phenotypic and the genotypic level. There are different causes of variation like due to natural selection, germinal variation, etc. Germinal variation is the variations among the organism due to genetic difference. Horn is the phenotypic character of the cattle whose expression is based on the expression of the gene related to the horns. If the gene of horn gets suppressed in some cattle, then the cattle become hornless.

Answer»

Variations: Differences in characters within very closely related groups of organisms are referred to as variations.

(OR)

Differences among living beings are called variations.

Ex: 1.

1. Earlobes in some humans are free and in others attached.

2. Colour of eyes (cornea) in some people are blue and in others black.

3. Colour of skin is black or white.

Variation is defined as the change which can be observed at the phenotypic and the genotypic level. There are different causes of variation like due to natural selection, germinal variation, etc. Germinal variation is the variations among the organism due to genetic difference. Horn is the phenotypic character of the cattle whose expression is based on the expression of the gene related to the horns. If the gene of horn gets suppressed in some cattle, then the cattle become hornless.

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