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Option 2 : Only women
- Women have a perfect pair of sex chromosomes XX while men have a mismatched pair in which one is a normal-sized X and the other a short one Y which is XY.
The correct answer is one X chromosome from the mother and one X chromosome from the father.
- Chromosomes are structures found in the center (nucleus) of cells that carry long pieces of DNA. DNA is the material that holds genes. It is the building block of the human body.
- Chromosomes also contain proteins that help DNA exist in the proper form.
- Chromosomes come in pairs.
- Normally, each cell in the human body has 23 pairs of chromosomes (46 total chromosomes).
- Half comes from the mother, the other half comes from the father.
- Two of the chromosomes (the X and the Y chromosome) determine your sex as male or female when you are born. They are called sex chromosomes:
- Females have 2 X chromosomes.
- Males have 1 X and 1 Y chromosome.
- The mother gives an X chromosome to the child. The father may contribute an X or a Y. The chromosome from the father determines if the baby is born as male or female.
- A human being has 23 pairs of chromosomes in which one pair of X and Y chromosomes determine the sex of the human being.
- If there is one X chromosome from the mother and one X chromosome from the father, then two X chromosomes (XX) make a girl whereas X chromosome from mother and Y chromosome from father then these chromosomes (XY) make a boy.
- The remaining chromosomes are called autosomal chromosomes.
- They are known as chromosome pairs 1 through 22.
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