What is dominace? Why are same alleles dominant and some recessive ?

What is Dominant and Recessive?

Whether an allele is dominant or recessive depends on:

Dominant genes and Recessive genes

Dominant & recessive trait

An allele is dominant if it is expressed in

An allele is dominant if it is expressed in:

An organism has a gene ' X '. Its dominant allele expresses character c - 1 while it's recessive allele expresses character c - 2 This dominant allele is completely dominant over the recessive allele . It has another gene ' y ' which in its dominant form doesn't allow any expression of gene ' x ' which of these genotypes of that organism Will produce character c - 1 ?

An organism has a gene ' X '. Its dominant allele expresses character c - 1 while it's recessive allele expresses character c - 2 This dominant allele is completely dominant over the recessive allele . It has another gene ' y ' which in its dominant form doesn't allow any expression of gene ' x ' which of these genotypes of that organism Will produce character c - 1 ?