Question

What will you look for to identify the sex of the following?

• A. Female cockroach - anal cerci
• B. Female Ascaris - sharply curved posterior end
• C. Male shark - claspers borne on pelvic fins
• D. Male frog - a copulatory pad on the first digit of the hind limb

Answer 1

The correct option is C

Male shark - claspers borne on pelvic fins

The correct option is C.

Explanation of correct option:

Male Sharks:

1. Male sharks have claspers which are paired intromittent organs.
2. Claspers are present on the inner margins of pelvic fins.

Explanation of incorrect options:

Option A

Anal cerci are present in both males and females. Therefore, option A is incorrect.

Option B

Female sharks have a straight posterior end as compared to the curled posterior head of a male shark. Option B is incorrect.

Option C

Male frogs have forelimbs that are absent in female frogs. Therefore, option D is incorrect.

Final answer:

Male shark - claspers borne on pelvic fins is used to identify the sex.