Question

Position of testis in Periplaneta americana

• A. $7^{th},8^{th}.9^{th}$ abdominal segments
• B. $4^{th},5^{th},6^{th}$ abdominal segments
• C. $8^{th},9^{th},{10}^{th}$ abdominal segments
• D. $5^{th},6^{th}$ abdominal segments

Answer 1

Answer: (B)

$4^{th},5^{th},6^{th}$ abdominal segments

• Cockroaches are dioecious and both sexes have well developed reproductive organs.
• The male reproductive system 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 the ejaculatory duct through seminal vesicle.
• Hence, the Position of testis in Periplaneta americana is 4th,5th,6th abdominal segments.
• So, the correct answer is '4th, 5th, 6th abdominal segments'.