Answer:
1. Dihybrid cross-refers to the breeding of individuals, which possesses genes for two distinct features. It is termed as dihybrid as one is considering a cross in between two distinct traits.
2. Punnett square refers to a grid system, which is used to determine the probable combinations of genes because of random fertilization. The Punnett square helps one to determine an outcome of breeding or a cross.
3. Codominance refers to the condition in which both the alleles are dominant. It comprises the alleles that exhibit the tendency of dominating at a similar time, and when an organism is heterozygotic, both the alleles are articulated.
4. Multiple alleles refer to a phenomenon in which more than two alternatives prevails for a gene.
5. Incomplete dominance refers to a condition in which none of the pair of alleles is recessive or dominant, thus, the traits get mixed in the phenotype.