His PhD is in biochemistry and statistics. Identical twins have the same genes or DNA. They are nurtured in equal prenatal conditions. If homosexuality is caused by genetics or prenatal conditions and one twin is gay, the co-twin should also be gay.y Mark Ellis. Dr. Neil Whitehead. Eight major studies of identical twins in Australia, the U.S., and Scandinavia during the last two decades all arrive at the same conclusion: gays were not born that way. âAt best genetics is a minor factor,â says Dr. Neil Whitehead, PhD.
Sloth bear range. The sloth bear is found on the Indian subcontinent in Nepal, Bhutan, Bangladesh, India and Sri Lanka. Two separate subspecies are recognised: the Sri Lankan sloth bear Melursus ursinus inornatus and the Indian sloth bear M. u. ursinus . More Â».
There are two species of two-toed sloth in South America  (Choloepus hoffmanni or Unau) found in the forested regions of northern South America from Ecuador to Costa Rica, and (Choloepus didattylus) in Brazil.wo-toed Sloth. ClipArt.com. Closely related to armadillos and anteaters, sloths originated in South America in the Late Eocene period, the dawn of recent life, when South America became became home to a unique zoo of hoofed mammals, edentates, marsupials, and more giant flightless birds (Phorusrachids)..