What Is a Woman?

young woman, exercise, weight training, gym
I bet “she” has XX chromosomes, not XY

U.S Supreme Court Justice Ketanji Brown Jackson in her Senate confirmation hearing had difficulty defining “woman.” IIRC, she she couldn’t do it, saying “I’m not a biologist.” Well, I’m not either. But I do have a BS degree in Zoology from way back in 1977.

Without putting much thought into it, here’s my proposed definition of an adult male or female:

If you’re 18 or older (“adulthood” in the U.S.) and a majority of your body’s cells have XY chromosomes, you’re a man. If not, you’re a woman.

Check out this .gov website for alleged facts on sex chromosomes (X and Y). A snippet:

Variation in the number of sex chromosomes in a cell is quite common. Some men have more than two sex chromosomes in all of their cells (the XXY variation is called the Klinefelter syndrome), and many men lose the Y chromosome from their cells as they age. 

“Variation in the number of sex chromosomes in a cell is quite common.” Quite common? Klinefelter syndrome occurs in 1 to 2.5 per 1000 boys and men (0.1 to 0.25 percent). It’s news to me that “many men lose the Y chromosome from their cells as they age.”

If a “man” wants to compete as a “woman” in women’s sports, he/she should have a majority of cells with XX chromosomes. Not all cells, but at least 50.001%

Steve Parker, M.D.

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