GCSE Biology - Family Trees / Family Pedigrees

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*** WHAT'S COVERED ***
1. Definition and purpose of family trees (family pedigrees).
2. Interpreting pedigree symbols and keys.
* Symbols for male and female.
* Symbols for affected, unaffected, and carrier individuals.
3. Understanding genetic terms in pedigrees.
* Alleles (dominant and recessive).
* Genotypes (homozygous dominant, homozygous recessive, heterozygous).
4. Deducing genotypes from pedigree charts.
5. Calculating inheritance probabilities.
* Using parental genotypes deduced from the pedigree.
* Calculating probabilities using Punnett squares.

*** EXAM BOARD INFO ***
AQA - Everything is relevant to your course!
IGCSE Edexcel - Everything is relevant to your course!
Edexcel - Everything is relevant to your course!
OCR 21st Century - Everything is relevant to your course!
OCR Gateway - Not relevant to your course

*** CHAPTERS ***
0:00 Intro to Family Trees / Pedigrees
0:22 Understanding Alleles (Recessive vs Dominant)
0:49 Genotypes (Homozygous vs Heterozygous)
1:10 Carriers
1:37 Pedigree Key Explained (Symbols)
2:46 Understanding Pedigree Structure (Generations & Relationships)
3:27 Deducing Genotypes from the Pedigree
4:50 Calculating Probabilities using Punnett Squares

*** PLAYLISTS ***










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