Rating Newest Oldest. Best Answer: *Hitchhiker's Thumb* The ability to bend the thumb backward (at least 45 degrees) is a caused by a dominant allele. The proper term for this is distal hyperextensibility.People with dominant alleles have more flexible ligaments and thus looser joints.However, other sites say that hitchhiker's thumb is autosomal recessive so your best bet would be to trust your textbook or just ask your teacher!Source(s): I take AP Biology! sparkles62190 Â· 8 years ago.eople with dominant alleles have more flexible ligaments and thus looser joints. However, other sites say that hitchhiker's thumb is autosomal recessive so your best bet would be to trust your textbook or just ask your teacher! Source(s): I take AP Biology!
The Emperor Caligula once decided to go to war with the Roman God of the sea, Poseidon, and ordered his soldiers to throw their spears into the water at random. (14) Comments invisible pink unicorn:
Greek inventor Archimedes is said to have used mirrors to burn ships of an attacking Roman fleet. But new research suggests he may have used steam cannons and fiery cannonballs instead. A legend begun in the Medieval Ages tells of how Archimedes used mirrors to concentrate sunlight as a defensive weapon during the siege of Syracuse, then a Greek colony on the island of Sicily, from 214 to 212 B.C.