This is the part of the business cycle in which output, or Real GDP has stopped its slide. Recovery
Trough
Peak
Expansion

what are the options? add them, then i will be glad to .

the answer to the blank provided is “an autosomal gene that is required for the expression of genes on the x chromosome”.

testis-determining factor, abbreviated as td, which is more popularly known as sex-determining region y or sry protein, is a dna-binding protein or  gene-regulatory protein/transcription factor, encoded by the  sry gene. it is the gene responsible for the initiation of male gender determination in humans.

occluded front i think