Biology

Comparison between male cockroach and female cockroach (Periplaneta americana)

Male cockroach	Female cockroach
1. Larger in size	Smaller in size
2. Narrow abdomen	Broad abdomen
3. Anal styles present	Absent
4. Brood pouch absent	Present
5. Wings extend beyond the tip of abdomen	Wings extend up to abdomen
6. Testes and associated organs are present	Ovaries and associated organs are present
7. Chromosome number (2n)= 33	Chromosome number (2n) = 34

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Biology