Tag Info

New answers tagged

2

Sequences that don't appear in a genome are called "nullomers". That article claims that there are no 10bp sequences that don't appear in the human genome, and 80 11bp sequences that don't, citing this paper.


1

The chromosomes in your picture do have sister chromatids, they are just very close together. A chromosome needs to pass through replication before it can compact into the typical metaphase chromosome shape depicted above. When I prepare metaphase chromosomes, I usually see a mixture of chromosome sets where the chromatids are close together (like above) and ...



Top 50 recent answers are included