A pedigree is a chart of a person\'s ancestors that used to analyze genetic inhe

Question

A pedigree is a chart of a person's ancestors that used to analyze genetic inheritance of certain especially diseases. The symbols used for a pedigree are: female, unaffected male, unaffected female affected male, affected Siblings are placed in birth order from left right and are labeled with numbers. Each generation is labeled with a Roman numeral. Example: we would name an individual I1-3 if he/she was in the second generation and the 3^rd child born Try to identify the genotypes of the following individuals using the pedigree above. (homozygous dominant, homozygous recessive, heterozygous) II-3: _______________ II-1: ______________ I-1: _____________ II-4: __________________

Explanation / Answer

1. homozygous recessive. because affected individual has unaffected parents

2. heterozygous

3. homoygous recessive

4.heterozygous because she is unaffected and her children are affected so she must be a heterozygous carrier.

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