In natural selection, how do advantageous traits typically spread through a population?

In natural selection, how do advantageous traits typically spread through a population?

• A. They appear spontaneously in every generation
• B. They are passed on to offspring in future generations
• C. They are always visible in adult individuals
• D. They are acquired through learning from parents

Answer: (B)

Advantageous traits spread because they are inherited and increase reproductive success. Natural selection acts on heritable variation shaped by genes. When an individual carries a beneficial trait, that individual tends to reproduce more or leave more surviving offspring. Those offspring also carry the trait, so its frequency rises in the population over generations. The process relies on genetic inheritance, not on traits appearing anew every generation or on anything learned. For example, a beneficial mutation that improves survival or reproduction will be passed to the next generation, gradually becoming more common as long as it continues to confer an advantage. Some traits may not be visible in every individual or may only show under certain conditions, and learned behaviors aren’t passed genetically, so they don’t automatically spread through a population via natural selection.

Advantageous traits spread because they are inherited and increase reproductive success. Natural selection acts on heritable variation shaped by genes. When an individual carries a beneficial trait, that individual tends to reproduce more or leave more surviving offspring. Those offspring also carry the trait, so its frequency rises in the population over generations. The process relies on genetic inheritance, not on traits appearing anew every generation or on anything learned. For example, a beneficial mutation that improves survival or reproduction will be passed to the next generation, gradually becoming more common as long as it continues to confer an advantage. Some traits may not be visible in every individual or may only show under certain conditions, and learned behaviors aren’t passed genetically, so they don’t automatically spread through a population via natural selection.