Discontinuous variation is a term used in genetics to describe a type of variation that is characterized by distinct differences rather than a range of values. The spelling of this word is "dis-kontin-yoo-us vair-ee-ey-shun" in IPA phonetic transcription. The "k" sound in "dis" is pronounced with aspiration, while the "t" in "continuity" is pronounced with a glottal stop. The stress falls on the second syllable, which is marked with a primary accent. This term is important in genetics research as it helps scientists understand the genetic factors that contribute to variation within populations.
Discontinuous variation refers to the type of variation in phenotypic traits where there is a distinct categorization or division between different possible outcomes or states. In this type of variation, there are no intermediate or continuous gradations between the different phenotypes or observable characteristics.
In biological terms, discontinuous variation is commonly observed in traits that are determined by a single gene or a few distinct genes. These genes possess different alleles that ultimately determine the expression of specific characteristics. As a result, individuals exhibit distinct and separate phenotypes or traits.
For example, in a population of pea plants, the flower color is determined by a single gene with two possible alleles - one for purple flowers and the other for white flowers. In this case, individuals will exhibit either purple or white flowers, with no intermediate or blending of colors. This is an example of a discontinuous variation.
Discontinuous variation can also apply to non-biological entities. For instance, in the field of linguistics, the presence or absence of a specific phoneme in a language can be considered a discontinuous variation. It is marked by discrete and separate categories, rather than a continuous range of sounds.
Overall, discontinuous variation involves distinct categorizations without any intermediate or continuous transitions. It is often attributed to the influence of discrete genetic factors or other non-biological factors that determine observable characteristics or outcomes.
The word "discontinuous" comes from the Latin word "discontinuus", which is a combination of the prefix "dis-" meaning "apart" or "not", and the Latin word "continuus" meaning "continuous" or "uninterrupted".
The word "variation" is derived from the Latin word "variatio", which means "change" or "diversity".
Therefore, when we combine these two words, "discontinuous variation" refers to a type of variation in which there is a distinct separation or interruption between different categories or forms.