The passage describes gamete production and fertilisation in human reproduction.
Complete the passage by writing a suitable word or words in each of the spaces.
In humans, the specialized sex cells required for sexual reproduction are collectively called [1].
In the male reproductive system, cells in the [2] undergo a reduction division known as [3] to produce haploid sperm cells.
In the female reproductive system, the female gametes develop inside fluid-filled sacs called [4], which are located within the [5].
During ovulation, a mature egg is released. For fertilisation to occur, sperm must swim through the cervix and uterus into the [6].
Following the fusion of the sperm and egg nuclei, a single diploid cell called a [7] is formed, which eventually divides by mitosis to develop into a [8].
