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Significance and prevention of mutations

Genetic variation – mutation

Effects of mutagens

Numerical chromosomal aberrations

Formation of numerical chromosomal aberrations

Numerical chromosomal aberrations

Relationship between maternal age and risk of Down's syndrome

Cystic fibrosis

The symptoms of cystic fibrosis

Sickle cell disease

The risk of having sickle cell disease

Sickle cell disease in the offspring

Sickle cell disease and malaria

Symbols used in pedigree charts

Pedigree charts

Your pedigree chart

Symbols used in pedigree charts

Pedigree analysis in practice