Answer:
A homozygous dominant trait will have both the dominant alleles of a gene for a trait. For example, the AA genotype of the 80 brown gerbils.
A heterozygous trait will have one dominant and one recessive allele for the particular gene. For example, the Aa genotype of the 64 brown gerbils.
A recessive trait will be the trait in which there is no dominant allele for the gene. The suppressed trait only occurs when both the alleles of the gene are recessive. For example, the aa genotype of the black gerbils.
The completed table is shown in the attachment.
