{"id":476,"date":"2006-12-09T09:22:14","date_gmt":"2006-12-09T07:22:14","guid":{"rendered":"http:\/\/www.wjst.de\/blog\/2006\/12\/09\/why-dog-and-cat-can%c2%b4t-marry\/"},"modified":"2025-10-11T20:47:04","modified_gmt":"2025-10-11T18:47:04","slug":"why-dog-and-cat-can%c2%b4t-marry","status":"publish","type":"post","link":"https:\/\/www.wjst.de\/blog\/sciencesurf\/2006\/12\/why-dog-and-cat-can%c2%b4t-marry\/","title":{"rendered":"Why dog and cat can’t marry"},"content":{"rendered":"

or in more scientific terms: Why are F1 hybrids so often sterile or lethal?<\/p>\n

The Dobzhansky-Muller theory says that there is an incompatibility between genes with reduced fitness that have diverged between species. So far nobody has ever observed a D-M gene but a new Science<\/a> paper describes two genes that separate D. simulans and D. melanogaster: lhr (lethal hybrid rescue) and hmr (hybrid male rescue).<\/p>\n

Well, dogs have 78 chromosomes, arranged in 39 pairs, while cats have 38 chromosomes, in 19 pairs – so no viable embryo can be produced.<\/p>\n

 <\/p>\n

Yea, Yea.<\/p>\n\n

 <\/p>\n

\n CC-BY-NC Science Surf , accessed 10.04.2026<\/span>\n <\/div>","protected":false},"excerpt":{"rendered":"

or in more scientific terms: Why are F1 hybrids so often sterile or lethal? The Dobzhansky-Muller theory says that there is an incompatibility between genes with reduced fitness that have diverged between species. So far nobody has ever observed a D-M gene but a new Science paper describes two genes that separate D. simulans and … Continue reading Why dog and cat can’t marry<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[2945,390,393,82,391,392],"class_list":["post-476","post","type-post","status-publish","format-standard","hentry","category-genetics-biology","tag-genetics-biology","tag-f1_hybrids","tag-fitness","tag-genes","tag-hybrid","tag-incompatibility"],"_links":{"self":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/476","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/comments?post=476"}],"version-history":[{"count":2,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/476\/revisions"}],"predecessor-version":[{"id":25717,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/posts\/476\/revisions\/25717"}],"wp:attachment":[{"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/media?parent=476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/categories?post=476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wjst.de\/blog\/wp-json\/wp\/v2\/tags?post=476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}