Agene may be described as
a sequence of amino acids
a sequence of bases on the dna that codes for a trait
a sequence of nucleotides that codes for sugars
a sequence of proteins produced by the rna

The correct answer for the fill in the blank is - A sequence of bases on the DNA that codes for a trait.

Gene is described as a segment of DNA ( dexoyribonucleic acid) that codes for a particular protein, which in turn corresponds to a trait/ characteristic of the living organism.

Gene is first transcribed into mRNA ( messenger RNA) through a process called transcription. mRNA is then converted into protein through a process called translation.

The protein thus formed corresponds to a particular trait ( like eye color, hair color).

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.