Predominant Strain of B. influenzae in Influenzal Meningitis

Abstract

In Habrobracon unfertilized eggs develop into [male][male], fertilized eggs ordinarily into [female][female]. Recent results indicate a sex-determining factor or region in one chromosome such that [female][female] are X + Y + 2A, haploid sons (X + A) and (Y + A) in equal numbers. It is suggested that eggs fertilized by either type of [male] are largely X+Y + 2A because of selective union of unlike gametes. Under certain conditions diploid biparental [male][male] are produced, interpreted as (2X + 2A) (from X + A fathers) or (2Y + 2A) (from Y + A fathers). The appearance of such [male][male] is associated with low hatchability, indicating low viability of these combinations. One gene, fused, gives results which indicate low ''% of crossing over with the above-mentioned sex-determining region.