Monotreme Reproductive Biology and Behavior

Monotremes atomic number 18 mammals that are oviparous, or egg- puting. There are unless 3 extant species of egg-laying mammals: the playtpus and two species of echidna. Their reproductive systems are highly specialized to facilitate two the production of eggs and milk. The virile tract is quite simple. The female tract has qualities kindred to those of birds, though female echidnas besides possess pouches. The monotreme egg is in like manner very specialized and somewhat comparable to a reptilian egg. Platypuses and echidnas live with very different behaviors when it comes to mating, precisely their genetics are quite similar. Monotremes possess a a few(prenominal) 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 junto either their own. Introduction At fi rst glance platypuses take care to be an amalgamation of mammals, birds, and everything in between. In fact, their reproduction biological science also has much in common with a innovation 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 cc 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 but trio living species of monotremes: the platypus (Ornithorhynchus anatinus) and two species of echidnas (Tachyglossus aculeatus, and Zaglossus bruijni). The banter 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 exit condone the backgrou! nd of the animals, the anatomy of the tract and egg, breeding behavior, and genetics...If you want to take down a full essay, order it on our website: OrderCustomPaper.com

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