Day 352 (Yq12): three days of heterochromatin; loss-of-Y in smokers


Day 352 has 0 protein-coding genes (browser view). The rest of Chromosome Y is constitutive heterochromatin – the longest such stretch in the genome.

Older men, especially smokers, tend to lose the Y chromosome in their blood cells; this is associated with higher cancer rates and Alzheimer’s.

Click here to see all 8175345 letters of Day 352.

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