Pedigree Chart & Phenotype Ratios

IB Biology: Pedigree Chart & Phenotype Ratios

The movie Teenwolf may just have been inspired by a real-life condition called hypertrichosis. There are just 40 sufferers in the world today.This activity asks students to draw a pedigree chart of a family who suffer from this sex-linked genetic condition. Then they deduce the genotypes of the family members and finally predict the ratio of phenotypes in a future generation.How can geneticists use family histories to...


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