Albinism is a recessive trait in humans. A geneticist studies family in which both parents are normal and at least one child has albinism. The geneticist reasons that both parents in these families must be heterozygous and the albinism should appear in ¼ of the children of these families. To his surprise, the geneticist finds the frequency of albinism trait is quite high. As a consultant, can you suggest an explanation for the higher expected frequency of albinism in these families

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

sex cells are usually half's then they find another half and make a fertilize egg