Column A
1.
Homozygous dominant:
Homozygous dominant
2.
Homozygous recessive:
Homozygous recessive
3.
Heterozygous:
Heterozygous
4.
Phenotype:
Phenotype
Column B
1. Having two copies of the dominant allele for a particular trait.
2. Having two copies of the recessive allele for a particular trait.
3. Having one copy of the dominant allele and one copy of the recessive allele for a particular trait.
4. The physical or observable characteristics of an organism resulting from the expression of its genes.