1. Mrs. Smith is seventy-nine. You would expect her skin to be: A. Thick and tough from years of use.
B. Soft from the extra oil older people produce.
C. Dry, thin and wrinkled from age.
D. Pretty much the same as it was when she was fifty.

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.

answerdendrites; blank(2) axons;