Studies on the Structure and Behaviour of Chromosomes of Oligodon arnensis Shaw (Colubridae: Ophidia)

Abstract

1. The diploid chromosome number in the males of this species is 46. The fundamental chromosome number is also the same.
2. No metacentrics have been observed in the karyotypes of this species. It is being reported for the first time for ophidian karyotypes.
3. Meiosis is normal. First and second metaphases show 23 bivalent and univalent chromosomes, respectively. Males are homogametic.
4. Possibility of the occurrence of M-A+A type of process is discussed.