Question
Study the pedigree chart given below and answer the questions that follow :
(i) Is this trait recessive or dominant ? Give reason.
(ii) Is this trait sex-linked or autosomal ? Give reason.
(iii) Among individuals 3, 4 and 7, which one is homozygous for the trait ?
Answer :
(i)
• Recessive Trait
• Individual 3 and 4 both do not suffer from the disease but have passed it to their offspring individual no. 7/ Unaffected parents of individual 7 have transmitted the trait to him.
(ii)
• Autosomal
• Both the sexes have equal chance having the trait.
(iii) Individual 7 is – homozygous.
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