An affected male infant born to normal parents could be an example of all of the following, except -
Ans. is 'a' i.e., Autosomal dominant disorder In Autosomal dominant disorders individuals are affected in successive generations. The disease does not occur in the offspring of unaffected individuals' ? Autosomal dominant o If both parents are normal, the disease cannot be autosomal dominant because it is manifested in Heterozygous state, So, even a single gene affection amongst the allel will cause the disease to be manifested. To be normal, a person should have normal copy of both allel. If both parents are normal, that means there is no abnormal gene. Autosomal recessive o In autosomal recessive disorder, if both parents are carrier (phenotypically normal) 25% of child will develop disease. Polygenic disorder o A trait is called `polygenic' if multiple genes on thought to contribute to the phenotype. o Polygenic disorders include Hypeension Diabetes, Asthma o A male infant with asthma or diabetes may will be born to normal parents Veically transmitted disorder o Passage of disease causing agent (pathogen) `veically' from mother to baby during the perinatal period is called 'veical transmission'. o A veically transmitted agent might lie dormant in the mother and not manifest in her clinically (normal mother) but may manifest in the child.
An Autosomal dominant disorder
An Autosomal recessive disorder
A polygenic disorder
A veically transmitted disorder