External Effects on Gene Expression

The video explores how external environmental factors influence gene expression in organisms. It discusses the effects of temperature on Himalayan rabbits, where pigmentation changes occur based on the temperature. It also covers how light wavelength affects butterflies' wing colors, with red and blue light leading to different outcomes. Additionally, the video explains photoperiodism in plants, where the length of light and darkness affects flowering through complex biochemical processes. Overall, it highlights the intricate relationship between genes and the environment.

What is photoperiodism and how does it affect flowering in plants?

Explain the relationship between an organism's genes and its external environment.