immune system, n the group of organs, cells, and chemicals that protect the body from harmful viruses, bacteria, and abnormal cells. It includes bone marrow, proteins, the thymus, the spleen, the lymphocytes, and other white blood cells.
50% from each parent: one allele in each gene, each parent, for a total of two. 2 people found this useful. Edit. Share to: 1  College Admission Interview Dos and Don'ts Some colleges offer applicants the opportunity to interview on campus or close to home.
If both your parents pass down a different version of a gene (non-identical copies, one on each chromosome) then you could say that you have different alleles on each locus (singular) for that gene. This would mean that you are heterozygous at that gene loci (plural).