Which of the following best describes a scientific theory? a. It cannot be changed.
b. It explains very few observations.
c. It may change.
d. It is basically speculation.

did you fail the test? xd

high growth (apex)

her affection for her parents makes her an especially sympathetic character.

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.