Question

The events in sexual reproduction are
(i) pre-fertilisation
(ii) fertilisation
(iii) post-fertilisation
The sequential order of their occurence is

• A. (ii) - (i) - (i)
• B. (ii) - (ii) - (i)
• C. (i) - (ii) - (iii)
• D. (i) - (iii) - (iv)

Answer 1

The correct option is C (i) - (ii) - (iii)

In spite of their morphological, anatomical and physiological differences, the fundamental events in sexual reproduction are the same. These events can be categorized as follows:

1. Pre-fertilization events: All the preparatory events which occur before the fusion of gametes are called pre-fertilization events. These include Gametogenesis and gamete transfer.

2. Fertilization: Fusion of two entire gametes ( one male and another female) to form a zygote.

3. Post-fertilization: All the events that occur during sexual reproduction after the fusion of gametes are called post-fertilization events.

So, the correct answer is '(i)-(ii)- (iii)'.