This is where Charles Darwin’s groundbreaking discovery of natural mutations, made 166 years ago, becomes relevant. Some plants naturally produce seedless fruit due to genetic mutations. For example, seedless watermelons are produced by crossing a regular (diploid) watermelon with a tetraploid watermelon, resulting in sterile offspring (triploids). This process is known as traditional plant breeding and has nothing to do with laboratory manipulation in the artificial sense that some people imagine.
Vegetative propagation, which occurs without pollination, is also common in some plants, such as bananas and pineapples. Seedless bananas are a well-known example. Bananas are naturally sterile hybrids, and humans have been propagating them for thousands of years through cuttings rather than seeds. Grafting and vegetative propagation without seeds are also used with many varieties of grapes, citrus fruits, and tomatoes, where cuttings are grafted or planted instead of growing plants from seeds. Farmers have practiced selective breeding for centuries, choosing seedless or low-seed fruits long before the emergence of modern genetic engineering.
Growing plants in artificial soil is unrelated to whether a fruit has seeds or not. Seedless fruits are cultivated in regular soil, just like seeded varieties, meaning the type of soil is irrelevant. Seedless fruits are safe and nutritious. What are genetic mutations in animals, humans, and plants, and how do they occur? Mutations are changes that occur in genetic material, either within DNA itself or in the sequence of genes. These changes can be very small or relatively significant. A gene can be viewed as a set of instructions stored inside a cell, and a mutation is an alteration or change in those instructions.
Such changes can occur naturally during cell division or as a result of external factors, including radiation, certain chemicals, or viruses. In humans, a mutation may be inherited from a parent and exist in all cells of the body from the beginning, or it may develop later in life and affect only certain cells. A mutation can be harmful, causing genetic disorders or increasing the risk of diseases such as cancer. It can also be beneficial or neutral, with no noticeable impact.
The same principles apply to animals and plants. In plants, some mutations can be passed to future generations more easily because of differences in reproduction and the cells involved in inheritance compared with animals. Mutations are the primary source of genetic diversity among living organisms and therefore play a major role in evolution, contributing to the differences between individuals and species. Without mutations, new genetic diversity would rarely emerge, making them essential to biological processes.
email: [email protected]