What occurs during DNA replication? A. Nitrogen bases floating in the nucleus randomly combine.
B. The two sides of a DNA molecule unwind and separate.
C. The DNA separates into the four nitrogen bases.
D. Adenine pairs with guanine and cytosine pairs with thymine.

answer; /// i believe that the correct answer is ( monophasic ); ethinyl estradiol- ethynodiol diacetate is a monophasic oral contraceptive agent; ///

rain is the best answer

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.