Question

a short note on dimorphism in cockroach

Answer 1

Sexual dimorphism in cockroaches varies widely. In some, the presence or absence of wings distinguish the sexes; in these usually males are active fliers and may have larger eyes, while the females are burrowers. Overall body size may also differ; generally speaking, males tend to be thinner in appearance than females. In some species, differences between the sexes are so dramatic that they have been classed as separate species in the past.

Answer 2

Dimorphism is the presence of two different forms of an organism in a population.

Many species exhibit sexual dimorphism whereby males and females have a different appearance. For example, males of the beetle Oedemera nobilis have swollen femurs whereas the females have slender femurs.

Another example of sexual dimorphism can be seen in Madagascan hissing cockroaches. Adult males have large lumps on their pronotums whereas females have a smooth pronotum.