Monotreme Reproductive Biology and Behavior

Monotremes argon mammals that are oviparous, or egg- puting. There are in so far 3 extant species of egg-laying mammals: the playtpus and two species of echidna. Their reproductive systems are tops(predicate) specialized to facilitate two the production of eggs and milk. The manlike tract is quite simple. The female tract has qualities akin(predicate) to those of birds, though female echidnas besides possess pouches. The monotreme egg is in like manner very specialized and somewhat equivalent to a reptilian egg. Platypuses and echidnas befool very different behaviors when it comes to mating, solely their genetics are quite similar. Monotremes possess a few large chromosomes and some(prenominal) unpaired microchromosomes. The descendants of the branch radiation of mammals, monotremes have characteristics of both placentals and marsupials, while still retaining characteristics of reptiles and birds in a conclave either their own. Introduction At first glance platypuses search to be an amalgamation of mammals, birds, and everything in between. In fact, their reproduction biota also has much in common with a intelligence operation form of animalsreptiles, birds, placentals and marsupial mammals. Platypuses belong to a group of animals called monotremes. These egg-laying mammals have been a closed book to researchers since their discovery by Westerners over two hundred years ago.

The first specimens of platypuses brought back to England were thought to be hoaxes similar to mermaids (Moyal, 2001). Found provided in and around Australia, there are plainly trio living species of monotremes: the platypus (Ornith! orhynchus anatinus) and two species of echidnas (Tachyglossus aculeatus, and Zaglossus bruijni). The word monotreme is Greek for one-hole, referring to the cloaca that is the exit for the urinary, reproductive, and excretory systems (Dawson, 1983). The creatures are oviparous--the females lay eggs that develop outside of her body. This paper get out condone the background of the animals, the anatomy of the tract and egg, breeding behavior, and genetics...If you fatality to take down a full essay, order it on our website: OrderCustomPaper.com

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