text: user3637: For example, I have two allelic genes. How can I identify a recessive and dominant gene? Are there any databases with this information? Or the answer to my question is to study the concept of "haplosufficiency"?
  
  user1332: I'd probably look up the genes in OMIM, which provides detailed description of the functions and phenotypes associated with genes, including inheritance mode.
  For example, this is what you would get for TP53:
  
  
original_text: 3637: <p>For example, I have two allelic genes. How can I identify a recessive and dominant gene? Are there any databases with this information? Or the answer to my question is to study the concept of "haplosufficiency"?</p>
   1332: <p>I'd probably look up the genes in <a href="https://www.omim.org/" rel="nofollow noreferrer">OMIM</a>, which provides detailed description of the functions and phenotypes associated with genes, including inheritance mode.</p>
  
  <p>For example, this is what you would get for TP53:</p>
  
  <p><a href="https://i.stack.imgur.com/fDdry.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fDdry.png" alt="OMIM Gene-Phenotype Relationships table for P53"></a></p>
  