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Why do german shepherds shed so much

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent