3.20 understand how to interpret family pedigrees
Inherited condition: filled in squares / circles (OFTEN diseases not always)
Circles and squares are phenotypes (can be observed)
DOMINANT OR RECESSIVE for those affected
Hypothesis 1: Dominant, caused by DD or Dd
That means the son is DD or Dd, which means at least one of the parents need to have a D, but since the parents are not affected, this cannot be true.
Hypothesis 2: Recessive, caused by dd
If both parents were Dd, then, one d from each of the parents might have been inherited to the son, resulting in dd. TRUE
à This inherited condition is caused by HOMOZYGOUS RECESSIVE GENOTYPE of dd 
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