Class 12 Biology Inheritance Variation LAW OF DOMINANCE


The dominant allele masks the effect of recessive allele. It explains the expression of only one of the parental characters in a monohybrid cross in F1 and expression of both in F2.

  • Characters are controlled by discrete units called factors.
  • In a dissimilar pair of factors one member of pair dominate the other. For example: allele of tallness (T) is dominant over allele of dwarf (t).

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