In a pedigree, if an affected father transmits the trait to all his daughters but none of his sons, which inheritance pattern is most likely?
Show answer and explanation
Correct answer: X-linked dominant
In X-linked dominant inheritance, an affected father passes his X chromosome to all daughters (who are affected) and his Y to sons (who are unaffected), giving exactly this pattern.
Keep practicing
More Pedigree analysis questions
- Which inheritance pattern would you suspect if multiple siblings are affected but neither parent shows the trait and there is consanguinity?
- Which mode of inheritance is nearly ruled out if affected males are found in consecutive generations and pass the trait to their sons?
- Which scenario describes pseudodominance that might mislead a pedigree analyst?
- In pedigree analysis, which of the following features strongly suggests an autosomal recessive rather than autosomal dominant inheritance f…
- Which pattern on a pedigree might suggest mitochondrial inheritance?
- If a pedigree shows an affected male whose mother is unaffected but paternal grandfather is affected, which inheritance pattern is least li…