Sunday, March 11, 2012

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

1 comment:

  1. you can also add chromosomes no. diff. this is also sexual dimorphic charatcer male have odd and female have even as per ncert of +2

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