The baby echidna, called a puggle, laps it up ... The last one remaining gets to mate with her. 6. Male echidnas have four-headed penises. The penis grows up to seven centimetres long when erect and ...
The male echidna has five X chromosomes, but only four Y chromosomes ... sperm and eggs (meiosis), these sex chromosomes pair in a head-to-tail manner and form chains, rather than the side ...
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Echidna Genome Sheds Light on Complex Sex Chromosome EvolutionThe male echidna has five X chromosomes, but only four Y chromosomes ... sperm and eggs (meiosis), these sex chromosomes pair in a head-to-tail manner and form chains, rather than the side ...
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