Why do we look different? The science of biological variation
In short: This video explores why organisms differ from one another, distinguishing between traits passed down through DNA and those shaped by our surroundings. It breaks down the mechanics of heredity versus environment.
The video categorizes variation into two primary types: genetic and environmental. Genetic variation involves inherited traits like blood groups or eye color, while environmental variation includes non-inherited features such as scars or learned languages. Some characteristics, notably human height, are determined by a complex interplay of both genes and external factors.
A key distinction is made between continuous and discontinuous variation. Continuous variation occurs when a trait can fall anywhere along a spectrum, such as height. In contrast, discontinuous variation involves distinct categories with no middle ground, such as whether an individual has attached or detached earlobes.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: KS3 Biology - Variation
To cite this card, link to https://intellectplus.co.uk/app/science-ks3-biology-variation.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Biology · More in Science · Latest · A–Z · All topics
