Cracking the Genetic Code: How to Read a Family Pedigree
In short: Genetic inheritance isn't just about your parents; it's a map of biological history. This video breaks down how to interpret family pedigrees to track traits, identify carriers, and predict the likelihood of inheritance.
The video covers the fundamental mechanics of family pedigrees, which are visual charts used to track the inheritance of specific traits across generations. You will learn to decode standardized symbols representing males, females, and their health status—specifically distinguishing between affected individuals, unaffected individuals, and carriers.
Beyond just reading symbols, the lesson explores the underlying genetics: alleles (dominant and recessive) and genotypes (homozygous dominant, homozygous recessive, and heterozygous). By combining these concepts, you can deduce the genotypes of ancestors and use Punnett squares to calculate the specific probabilities of a trait appearing in future generations.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: GCSE Biology - Family Trees / Family Pedigrees (2026/27 exams)
To cite this card, link to https://intellectplus.co.uk/app/science-gcse-biology-family-trees-family-pedigrees-2026-27-exams.
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
