The worm gets coated with antibodies, which activate other cells in the immune system to secrete chemicals that kill it.
Explanation:
Production of T-helper I cytokines like IFN gamma, IL-2 and IL-18 is highly protective against helminth infection by activating the macrophage intracellular killers. Protection against mucosal eosinophil responses in which antiparasitic chemicals are released. Killing also involves direct cytotoxic mechanisms in which T- cell and NK-cells directly release antiparasitic agents like perforin and granulysin which kill the parasite.
Since the female parent is homeozygous, whichever allele the males get, they will receive a red-eye allele. Females are red-eyed because the presence of the recessive copy is masked. Males are red-eyed because they only have one copy of the gene, and that copy is for the red allele.
