Chromosome Studies in Some Deer, the Springbok, and the Pronghorn, with Notes on Placentation in Deer

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Abstract
The chromosome complement was studied in the following 6 species, all members of the Artiodactyla: Virginia white-tailed deer (Odocoileus virginianus borealis, 2n = 70), mule deer (Odocoileus hemionus, 2n =70), fallow deer (Dama dama, 2n = 68), muntjac (Muntiacus reevesi, n =46), pronghorn (Antilocapra americana, 2n = 56 and 58), and springbok (Antidorcas marsupialis, 2n = 56). Karyotypes of each species were presented, with a discussion on hybridization of the species. Placentation in the white-tailed deer was briefly described. Placental anatomy and chromosomes from leukocyte cultures of opposite-sexed white-tailed deer twins were investigated for the possible existence of chim-erism and freemartin effects as a cause of antler growth in does. No evidence for a common circulation between the twins was found.

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