This article is within the scope of WikiProject Molecular Biology, a collaborative effort to improve the coverage of
Molecular Biology on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.Molecular BiologyWikipedia:WikiProject Molecular BiologyTemplate:WikiProject Molecular BiologyMolecular Biology articles
ZW sex-determination system is part of WikiProject Birds, an attempt at creating a standardized, informative and easy-to-use ornithological resource. If you would like to participate, visit the
project page, where you can join the
discussion and see a list of open tasks. Please do not
substitute this template.BirdsWikipedia:WikiProject BirdsTemplate:WikiProject Birdsbird articles
ZW sex-determination system is part of WikiProject Amphibians and Reptiles, an effort to make Wikipedia a standardized, informative, comprehensive and easy-to-use resource for
amphibians and
reptiles. If you would like to participate, you can choose to edit this article, or visit the
project page for more information.Amphibians and ReptilesWikipedia:WikiProject Amphibians and ReptilesTemplate:WikiProject Amphibians and Reptilesamphibian and reptile articles
This article is within the scope of WikiProject Plants, a collaborative effort to improve the coverage of
plants and
botany on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.PlantsWikipedia:WikiProject PlantsTemplate:WikiProject Plantsplant articles
This article is within the scope of WikiProject Lepidoptera, a collaborative effort to improve the coverage of
butterflies and moths on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.LepidopteraWikipedia:WikiProject LepidopteraTemplate:WikiProject LepidopteraLepidoptera articles
Information regarding the homology of the platypus sex chromosomes and the eutherian sex chromosomes is old and incorrect. Further studies have revealed the platypus X chromosomes have a great deal of homology with the chicken Z yet no homology with the eutherian X chromosomes.
Phisch Tarko (
talk)
12:34, 6 April 2008 (UTC)reply
I think the thing stating that one or the other gamete determines sex is wrong, in all systems it's the overall mechanism not either gamete that makes the determination. The distinction is in which gender gets the homogeneous gametes as I understand it.
72.228.177.92 (
talk)
19:03, 30 December 2011 (UTC)reply
Asexual reproduction
"However, because of their WW chromosomes, any offspring they produce will be female", does this mean if she reproduces asexually her offspring will be female (which is obvious), or that even if she reproduces with a male, her offspring will be only female, and if this is the case, why?
Bumblebritches57 (
talk)
02:41, 22 April 2015 (UTC)reply
The second paragraph of the Significance section reads:
"The platypus, a monotreme mammal, has a system of 5 pairs of XY chromosomes. They form a multiple chain due to homologous regions in male meiosis and finally segregates into XXXXX-sperm and YYYYY-sperm. The bird Z-like pair shows up on opposite ends of the chain. Areas homologous to the bird Z chromosome are scattered throughout X3 and X5."
This needs some sort of clarification and/or context, especially regarding the 3rd sentence. It's unclear what exactly "bird Z-like pair" means, and the way it's phrased makes it seem like it's been talked about before when it hasn't. The paragraph then goes on to say that the platypus doesn't actually have X chromosomes, further confusing the paragraph by indicating that none of it was actually notated in any sort of correct way.
2600:1702:3C80:3050:310D:7AD3:D74C:903A (
talk)
03:40, 2 June 2020 (UTC)reply