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).