A few statements with regard to sexual reproduction are given below:

i. Sexual reproduction does not always require two individuals

ii. Sexual reproduction generally involves gametic fusion

iii. Meiosis never occurs during sexual reproduction

iv. External fertilisation is a rule during sexual reproduction

Choose the correct statements from the options below:

I. Sexual reproduction does not always require two individuals. In certain bisexual plants and hermaphrodite animals which have both male and female reproductive parts in one requires an individual only.

II. Sexual reproduction always involves the fusion of male and female gametes to produce a zygote.

III. Meiosis or reduction division takes place occurs during sexual reproduction. Meiosis reduces the diploid gamete (2n) of the gametes to haploid gamete (n) in the zygote.

IV. External fertilisation is not a rule during sexual reproduction. In mammals and many other animals fertilisation takes place inside the female body that is internal fertilisation.

Hence only i and ii statements are true.