Alleles

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An allele (allélon = each other, mutual) is a small section in the DNA chain that represents a specific variant of a gene. The DNA can vary at a gene locus, i.e. at a specific position on a chromosome. For example, for a gene that determines the flower colour of a plant, there may be one allele that colours the flowers red and the second, opposite allele that colours the flowers white. This transfer during reproduction confirms the Mendelian rules discovered by Gregor Mendel (1822-1884) in 1865 and named after him.

Allele - Trauben rot, blau, gelb, lila

When two grape varieties are crossed, the genetic information for the berry colour and leaf shape of the parent varieties, among other things, is passed on. The offspring of this cross receives these characteristics according to Mendel's rules. The colour yellow is rather unlikely, but possible; in most cases it will be purple.

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Alleles

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Alleles

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