Dicentric chromatid and an acentric fragment may also occur following chromosome breakage or inverted cross over during meiosis (Rees and Thompson 1955, Matsura

Since Sturtevant (1921) first detected inversions in Drosophila through the altered order of genes in linkage groups, inversions have been rarely found in plants and animals. They seem to be more common in interspecific hybrids (Stebbins 1971). However, they are more frequent in natural populations than any other type of chromosomal aberrations and are commonly recognized by bridge-frag ment configuration. Inversion heterozygosity has been instrumental in establishing species relationships in Drosophila (Sybenga 1972) and among plants in Lilium (Darlington 1958) and possibly in Paeonia (Snow 1969). During the present study of detailed male meiosis in 30 species of Crotalaria, some interesting meiotic ana phases were observed in C. sericea (2n=16) and C. retusa (2n=16). All other species generally showed normal behaviour with 8:8 distribution (Verma and Raina 1980). The methods used are the same as reported earlier (Khoshoo and Raina 1968).