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Pedigree AnalysisModerator: BioTeam
2 posts • Page 1 of 1
Pedigree AnalysisI want to know if I have this correct because I am confused.
I think this is x-linked recessive is that right since it can fall into this category 1.Usually more males than females are affected. 2. Affected sons are usually born to unaffected mothers; thus, the trait skips generations. 3. Approximately half of a carrier (heterozygous) mother’s sons are affected. 4. Never passed from father to son. 5. All daughters of affected fathers are carriers. Also I am unsure if the genotypes are correct
1. Cannot be x-linked recessive: in order to have an affected female progeny, you need to have heterozygous carrier mother AND father. That means that father would be affected too (single X chromosome).
2. Thus, it's an autosomal (see above) recessive (since neither parent affected, it cannot be dominant). Tip: in pedigree analysis you must identify what it cannot possibly be and then you will be left with only possibility.
2 posts • Page 1 of 1
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