background: the sperm count and function may be affected by karyotype abnormalities or microdeletion in y chromosome. these genetic abnormalities can probably transmit to the children. objective: in this study, we tried to determine the frequency of karyotype abnormalities and y chromosome microdeletions in severe oligospermic or azoospermic men who fathered sons by icsi. materials and methods:...

Hybridization and introgression have a significant impact on the taxonomically controversial genus Pulmonaria. Within this genus, P. hirta complex shows puzzling systematic relationships among s.str. (2n = [22, 26] 28), apennina 22 [26]), vallarsae 22), showing range overlaps mixed phenotypes in southern Europe. We carried out morphometric analyses of basal leaves flower features along with AFL...

The chromosome number and karyotype formula of interesting five genera six species Araceae from Thailand were studied, including Lasia spinosa —uncommon local Thai vegetable (2n=26, L6sm+L2st+Mm14+M4sm), Pistia stratiotes—common aquatic plant (2n=28, Lm10+Mm18), Pycnosphata palmata—rare endemic to Laos Lm12+L4sm+M6m+M2sm+M2st), Scittomaglottis calyptrata—rare in Lm6+L2sm+Mm6+Msm12), Typhonium g...

The relationship between species number and island area is a fundamental rule in ecology. However, the extent to which interactions with exotic species and how the structure of species interactions is related to island area remain unexplored. Here, I document the relationship between island area and (i) interactions with exotic species and (ii) network structure of species interactions in the c...

We analyze a class of models for unequal crossover (UC) of sequences containing sections with repeated units that may differ in length. In these, the probability of an 'imperfect' alignment, in which the shorter sequence has d units without a partner in the longer one, scales like qd as compared to 'perfect' alignments where all these copies are paired. The class is parameterized by this penalt...

Manual dexterity declines with increasing age, however, the way in which inter-manual asymmetry responds to aging is unclear. Our purpose was to determine the effect of age and practice on inter-manual performance asymmetry in an isometric force pinch line tracing task that varied in difficulty within segments. Thirty right-handed participants, five males and five females in each of three age g...

introduction: due to the complexity of facial asy-mmetry, the diagnosis of different aspects of asymmetry via conventional radiographs is not precise. in this study, we investigated findings of facial asymmetry by using cone- beam computed tomography (cbct) images. materials and methods: in this descriptive study, we evaluated cbct findings of 18 patients i.e. a group of 14 females and 4 males ...

The mitotic chromosome number and karyotype of Sophora fernandeziana (Phil.) Skottsb. (subfamily Papilionoideae) are reported for the first time. The chromosome number, 2n = 18, is the modal number reported for the genus. The chromosomes are small (average length 1.55 ± 0.23 J.1m) and bear no satellites. The intrachromosomal and interchromosomal asymmetry indices were AI = 0.26 and A2 = 0.18, r...

Indigofera santapaui Sanjappa is little-known species and reported from very few localities of the north Western Ghats. In present investigation, somatic chromosome number (2n=16) karyotype analysis were for first time in I. santapaui. The formula was observed to be 2n=16=12m+4sm. Karyotype fell 2B asymmetric category Stebbins’ classification.