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.

How does temperature influence gene expression in Himalayan rabbits?

• It changes the color of their pigmentation.

• It alters their diet preferences.

• It affects their ability to reproduce.

• It causes them to develop longer fur.

What happens to Vanessa butterflies when caterpillars are raised under red light?

• They have intensely colored wings.

• They develop larger wings.

• They grow at a faster rate.

• They become nocturnal.

Which light condition results in Vanessa butterflies having paler wing colors?

• Yellow light

• Green light

• Red light

• Blue light

What is photoperiodism in plants?

• The process of photosynthesis

• The impact of soil nutrients on flowering

• The effect of temperature on plant growth

• The response to the relative length of light and darkness

What role do photoreceptors play in photoperiodism?

• They help in seed dispersal.

• They absorb water for the plant.

• They detect changes in light and trigger biochemical pathways.

• They store energy for the plant.