Definition of Gene Frequency

Which of the following is defined as the fraction of all the alleles that occur at a given locus in a specified population?

Match: Bases of Selection and Their Key Features

Match the column — Bases/methods of selection and their key features: TABLE-I1) Selection Index2) Progeny testing3) Individual selection4) Sib selection TABLE-IIa) Most accurate aid to selectionb) Best aid to selection for carcass traits in sheepc) Most efficient aid to selectiond) Most efficient method of selection