Question

If an affected male has all affected daughters but no affected sons, the trait is likely to be an

Select one:

a. X-linked dominant trait

b. Due to epistasis

c. X-linked recessive trait

d. autosomal recessive trait

e. autosomal dominant trait

Answer 1

X linked dominant

The question is describing the characteristic feature of X linked dominant trait.

X linked recessive - if mother is a carrier than 50% of the sons will be affected and if the mother is affected than all the sons will be affected and if father is affected than daughters will be carriers

Autosomal dominant - present in all the generations, affected parents have affected progeny and vice versa

Autosomal recessive - unaffected parents have affected progenies and vice versa, not present in all the generations

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