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1

It's interesting that not only the leader 19, but also 16 and 17 follow a similar trend. Perhaps their size could be the best weight/length proportion to ensure a safe replication? Then what would have to be explained would be 18, so far to the left. That could be if 18 is newer, resulting from the split of a larger chromosome or the fusion of two smaller, ...


4

This Nature paper from 2004, by Jane Grimwood et al. goes at least a long way towards giving an answer to the question of the OP. In short: there were inordinately many duplications, especially during an event 30-40 million years ago, as well as during a much more recent event. These duplications are, uncharacteristically, predominantly intra-chromosomal ...


2

Before I actually answer your question, let us clear up some problems in your assumptions. The fact that you expect 50% similarity in siblings is a full of several assumptions. Imagine a case of a simple diploid organism with 2 traits. To restate your assumption, if both the parents are heterozygous in either of the two traits, and the alleles present in ...



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