Is counting of each SNP position starts from the beginning of each chromosome? Or it is continuous?
In my dataset first snp for chromosome 2 rs2685230 has a position 437664 and last SNP rs10191556 has a position 242521405
But first SNP at chromosome 13 rs11617984 has a position 19622143
Is this a mistake in my data, or it means that 13 chromosome has a first SNP at 19622143? Is it supposed to be shorter than chromosome 2?