What is true about all real machines? =equals

>greater than

work output = work input

work output > Work Input

work output < work input

work output may be < or > work Input

I think it's the first one

Explanation:

I don't know though so don't trust me unless someone else says the same thing

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.