The chromosomes of an egg-laying mammal Tachyglossus aculeatus (the echidna).
D000818:Animals; D001854:Bone Marrow Cells; D002874:Chromosome Mapping; D002875:Chromosomes; D005260:Female; D005838:Genotype; D007621:Karyotyping; D008297:Male; D008322:Mammals; D008540:Meiosis; D008938:Mitosis; D009007:Monotremata; D012730:Sex Chromosomes; D012744:Sex Ratio; D013737:Testis / Q000166:cytology