Year 10, Pathway C 2012

 Pedigree means a lineage or descent of animals or plants  Pedigree charts are used to trace the occurrence of a particular phenotype amongst a family tree

Male with characteristic Male without characteristic Female with characteristic Female without characteristic Female with blend of characteristic

 If we are monitoring blue eyes phenotype:  If we are monitoring brown eyes phenotype: Has blue eyesDoes not have blue eyes Has brown eyesDoes not have brown eyes

 Is shaded characteristic dominant or recessive?  What is the genotype of the parents of III 1?  What is the genotype of III 4,5 and 6? I II III

 Black is not always recessive – must check each pedigree chart