<h2>Answer:</h2><h3 /><h3>✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧</h3><h3 /><h3></h3><h3>✅ THE FOURTH ONE!</h3><h2>Explanation:</h2><h3>❗ The X chromosome is one of the two sex chromosomes in humans (the other is the Y chromosome). The sex chromosomes form one of the 23 pairs of human chromosomes in each cell. The X chromosome spans about 155 million DNA building blocks (base pairs) and represents approximately 5 percent of the total DNA in cells.</h3><h3>~ ₕₒₚₑ ₜₕᵢₛ ₕₑₗₚₛ! :₎ ♡
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