Answer:
Homozygous.
Explanation:
A cell is said to be homozygote for a particular gene when similar allele of the gene are found on the same loci of both homologous chromosomes in the cell.
if two copies of a gene that codes for a particular trait is present in an individual, such that each time the copies of gene are fully expressed despite the presence of any other allele of the same gene, the expressed gene is said to be homozygote -dominant for that character, or trait.
Such dominant allele is usually represented in genetic diagram by upper case letter. Assuming the trait is white color the gene is represented with W., while the Genotype combination is represented as WW. since the two genes are present on both homologous chromosomes.
Therefore, if each time the homozygous dominant gene is crossed with another allele for the same traits, and the dominant allele always express from generation to generation, then the homozygous dominant allele is said to always breed-true.
The homozygous gene that can not express itself in the presence of dominant gene, but only does so in its absence , that is only when in presence of similar allele is said to be Homozygous- recessive for that gene. The gene is usually represented by Lower case, e.g w and the genotypic combinations by double lower case ww.
