Syngamy Cell Formation Explained
The question asks to identify the specialized cell formed as a result of syngamy. Let's break down what syngamy means and the process involved in plant reproduction.
Understanding Syngamy
Syngamy is a crucial event in sexual reproduction. It refers to the process where the male gamete (sperm) fuses with the female gamete (egg cell). This fusion results in the formation of a diploid cell.
The Fusion Process
During fertilization in flowering plants:
- A pollen grain lands on the stigma and germinates, forming a pollen tube.
- The pollen tube grows down towards the ovule.
- Inside the ovule, there is an embryo sac containing the female gamete (egg cell) and usually two polar nuclei.
- Two male gametes travel through the pollen tube.
- One male gamete fuses with the egg cell. This specific fusion is called syngamy.
- The other male gamete fuses with the polar nuclei in a process called triple fusion.
Identifying the Result of Syngamy
The fusion of the male gamete and the egg cell during syngamy leads to the formation of a diploid cell. This cell contains the combined genetic material from both parents and is known as the zygote.
The zygote is the first cell of the new sporophytic generation. It subsequently undergoes mitotic divisions and differentiation to develop into an embryo.
Analyzing the Options
- Polar nuclei: These are typically two nuclei found in the central cell of the embryo sac. They are involved in triple fusion, not syngamy.
- Zygote: This is the correct term for the diploid cell formed by the fusion of the male gamete and the egg cell (syngamy).
- Antipodal cells: These are three cells located at the chalazal end of the embryo sac. They are generally nutritive or protective and degenerate during or before fertilization. They are not formed by syngamy.
- Endosperm: This is a nutritive tissue formed from the fusion of one male gamete and the polar nuclei (triple fusion). While it forms during fertilization, it is not the direct result of syngamy.
Therefore, the specialized cell formed directly from syngamy is the zygote.
Important Questions from Reproduction in Organisms
The term "Clone" is used to describe the offspring that are:
Vegetative propagation in Eicchornia and Pistia occurs by ________.
The reproduction process in which only a single parent is involved is called _____.
In which of the following animals does internal fertilization take place?
Name a reproductive strategy in which parasites take advantage of the care of other individuals of the same species or different species to raise their young.
