Which of the following are true for a scientific theory. CHOOSE ALL THAT APPLY. it is an educated guess it is extensively and reproducibly tested it is a principle or natural law theory and hypothesis are the same it may be modified​

and i oop

explanation:

condenser is used to focus in the light microscope.

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.