Which of the following is/are advantages of using natural polymers as biomaterials: a) often degraded by naturally occurring enzymes b) none of the above c) all of the above d) never elicit immune response manufacturing manipulation e) is never difficult because they are more complex than synthetic polymers.

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.