Question

Differentiate between male and female cockroach on the basis of external morphology.

Answer 1

Male Cockroach	Female Cockroach
The body of male cockroach is smaller than the female.	The body of female cockroach is relatively larger than the male.
The abdomen of male cockroach is slender and the last segment of the abdomen is pointed.	The abdomen of female cockroach is boat-shaped and the last segment is blunt.
The wings of male cockroach are larger than that of the females and extend beyond the abdomen.	The wings of female cockroach are smaller than that of the males and extend up to the tip of the abdomen.
The antennae of male cockroach are smaller than that of the females.	The antennae are relatively larger than that of the males.
In the 9th sternum of abdomen a pair of small, un-jointed anal styles and in the 10th tergum of abdomen a pair of long, palp-like jointed anal cerci are present.	Only a pair of anal cerci is present in of female cockroach.
The sternum of mesothorax is not bifurcated.	The sternum of mesothorax is bifid.