Questions

Leukocyte, commonly known as a white blood cell (WBC), is a major component in protecting the body against invading microorganisms and body cells with mutated DNA, and they clean up debris. 

B Lymphocyte also called as B-Cells or plasma cells produces the antibodies or immunoglobulins that bind to specific foreign or abnormal components of plasma membranes. This is also referred to as humoral (body fluid) immunity.

Genetic recombination is a complex process that involves alignment of two homologous DNA strands, precise breakage of each strand, equal exchange of DNA segments between the two strands, and sealing of the resultant recombined DNA molecules through the action of enzymes called ligases.

Crossing over, independent assortment and fertilization are methods of genetic recombination.