How are dominant and recessive alleles of a gene inherited?

the functional activity of the dominant allele of a gene does not depend on the presence in the body of another gene of this trait. The dominant gene is thus dominant; it is already apparent in the first generation.
The recessive allele of a gene can manifest itself in the second and subsequent generations. For a trait formed by a recessive gene to manifest, it is necessary for the descendant to receive the same recessive version of this gene from both the father and the mother (i.e., in the case of homozygosity). Then, in the corresponding pair of chromosomes, both sister chromosomes will have only one this variant, which will not be suppressed by the dominant gene and can manifest itself in the phenotype.