Question

Give a schematic representation of oogenesis in human females.

Hint:

In oogenesis, meiosis is incomplete until fertilization. This ensures that the female gamete (ovum) is haploid, ready to merge with the male gamete during fertilization. In pollination, the main aim is to transfer pollen efficiently between flowers to ensure genetic diversity.

Answer 1

Oogenesis in Human Females: Schematic representation of oogenesis:
Oogenesis is the process by which the female gametes, or ova, are produced in the ovaries. The stages of oogenesis are as follows:
- Oogonium (2n): The initial germ cells that undergo mitosis.
- Primary oocyte (2n): These are the oogonia that have entered prophase I of meiosis.
- Secondary oocyte (n): After completing meiosis I, the primary oocyte divides to form a secondary oocyte and a polar body.
- Mature ovum (n): The secondary oocyte completes meiosis II upon fertilization, forming a mature ovum and another polar body.
\[ \begin{array}{c|c} \text{Oogonium (2n)} & \text{Primary Oocyte (2n)}
\hline \text{Undergoes mitosis} & \text{Undergoes meiosis I}
\end{array} \]