Muscles attach to and are responsible for the body's movement.
What could be in the blank?

Skeletal muscle is attached by cord-like tendons to bone, such as in the legs, arms, and face. Skeletal muscles are called striated (pronounced: STRY-ay-ted) because they are made up of fibers that have horizontal stripes when viewed under a microscope.

Explanation:

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;