Question
Study the given pedigree chart and answer the questions that follow. (a) Is the trait given in the chart dominant or recessive ? Give reason in support of your answer. (b) Is this trait autosomal or sex-linked ? Give reason in support of your answer. (c) Write the possible genotypes of the children numbers the second generation.
Answer :
(a) Recessive trait, both the parents in generation I do not express the trait yet it appears in the progeny.
(b) Autosomal trait, both male and females have equal chances of getting the trait.
(c) Child ‘1’ : Aa/AA , Child ‘3’ : Aa
or
(a) Recessive trait, both the parents in generation I do not express the trait, yet it appears in the progeny.
(b) Sex linked trait, comparatively more male are getting affected.
(c) Child ‘1’ : XY, Child ‘3’: X’ X(carrier)
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