ikefalcon
ikefalcon t1_ixs4n9t wrote
Reply to comment by albene in TIL that turkeys can sometimes reproduce asexually, forming near-clones of themselves. by WaryLouka
Imagine having a child with your opposite-sex clone.
ikefalcon t1_ism6707 wrote
Hang up? Hang up?! You mean you’re not going to skate on it??
ikefalcon t1_j508nej wrote
Reply to comment by VictoriousEgret in Given that reproduction is difficult or impossible when both animals have different numbers of chromosomes, how did so many species evolve to have so many different numbers of them? by MercurioLeCher
As the previous commenter said, human chromosome 2 has nearly identical sequences to chromosomes 2a and 2b in the other great apes. It’s believed that human ancestors like Neanderthals had 23 chromosome pairs like humans.
Also, chromosomes usually have 1 centromere (center link between pairs of chromatids) and 2 telomeres (basically end caps of the chromosome). Human chromosome 2 has a vestigial (unused due to no longer being needed) extra centromere and 2 vestigial telomeres found inside the chromosome sequence.
This is pretty good evidence that there used to be 2 chromosomes before they fused together.