Fig. 1 in The effect of X-rays on cytological traits of Tuta absoluta (Lepidoptera: Gelechiidae)

Fig. 1. Cytogenetic analysis of non-irradiated T. absoluta individuals. (a) Female mitotic metaphase; (b) male mitotic metaphase; (c) female pachytene complement with a WZ bivalent identified according to W-chromosome heterochromatin; (d) male pachytene complement; (e) a highly polyploid female nucleus of Malpighian tubule cells with a large sex chromatin body; (f) a male nucleus of Malpighian tubule cells without W chromatin. Bar = 5 µm (a,b); 10 µm (c,d); 20 µm (e,f). Arrowheads indicate largest chromosomes of the complement, i.e., W and Z sex chromosomes; and arrow indicates sex chromatin.