Reproduction system of Cockroach MCQ - Practice Questions with Answers

Reproduction in Cockroach

• Cockroaches are dioecious. The male and female reproductive organs are present in different organisms. 
• Both sexes have well developed reproductive organs. 

Male Reproductive System

• It consists of a pair of testes one lying on each lateral side in the 4th-6th abdominal segments.
• From each testis arises a thin vas deferens, which opens into ejaculatory duct through seminal vesicle. 
• The ejaculatory duct opens into male gonopore situated ventral to anus.
• A characteristic mushroom-shaped gland is present in the 6th-7th abdominal segments which functions as an accessory reproductive gland.
• The external genitalia are represented by male gonapophysis or phallomere (chitinous asymmetrical structures, surrounding the male gonopore).
• The sperms are stored in the seminal vesicles and are glued together in the form of bundles called spermatophores which are discharged during copulation.
   

Female Reproductive System

• It consists of two large ovaries, lying laterally in the 2nd – 6th abdominal segments.
• Each ovary is formed of a group of eight ovarian tubules or ovarioles, containing a chain of developing ova.
• Oviducts of each ovary unite into a single median oviduct (also called vagina) which opens into the genital chamber.
• A pair of spermatheca is present in the 6th segment which opens into the genital chamber.