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[–]Omina_Sentenziosa 8 insightful - 3 fun8 insightful - 2 fun9 insightful - 3 fun -  (3 children)

And yet, a single drop of blood could prove that his very male Y chromosome is still present in every molecule of his body.

[–]MarkTwainiac 4 insightful - 1 fun4 insightful - 0 fun5 insightful - 1 fun -  (2 children)

I know you're going by this fella's phrasing, but just for the record: sex chromosomes are in cells, not molecules. Also, AFAIK humans' mature red blood cells don't contain sex chromosomes.

Moreover, whilst nearly all the cells in male humans that contain sex chromosomes are indeed XY, during the development of sperm cells (spermatogenesis), the X and Y chromosomes are segregated into different and separate cells so that an individual sperm usually will carry only one or the other - meaning they are X or Y.

[–]Omina_Sentenziosa 4 insightful - 1 fun4 insightful - 0 fun5 insightful - 1 fun -  (0 children)

Yes, I was going by his phrasing and no, red cells don' t have sex chromosomes, but blood isn' t made of only red cells. DNA can be extracted from blood, specifically white cells and epithelial cells.

As for the second part, I wasn' t talking about sperm, I was talking about blood.