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Assertion: Only a boy child chould be bo...

Assertion: Only a boy child chould be born with a subtitution of glutamic acid by valine on 6th codon of `beta`-chain of haemoglobin.
Reason: The gene for above mutation occurs on Y-chromosome.

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The correct Answer is:
D
Both male/female child could be born with a substitution of glutamic acid by valine on 6th codon of `beta`-chain of haemoglobin.
The gene for above mutation occurs on X-chromosome.
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Assertion :-Sickle-cell anaemia is caused by the substitutin of glutamic acid by valine at the sixth position of the beat globin chain of the hemoglobin moecule. Reason :- It is due to the single base substatution at the sixth codon of the beta lobin gene from GUG to GAG.

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Identify the pheonomenon in the following example- ''Sickle cell anaemia is an autosomal receissive trait. It is caused by the substituation of amoni acid glutamic acid (Glu) by vlaine (val at the sixt position of the beta globin of haemoglobin. This substituatio of amino acid occurs due to a phenomenon is which the sixth codon of beta globinc gene is. transformed from GAAG t GUG''

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The defect sickle-cell anaemia is caused by the "_____" of glutamic acid by the valine at the 6^(th) position of the "_____" globin chain of the haemoglobin molecule.

Assertion: Colour blindness occurs in about 8 per cent of male and only about 0.4 percent of females. Reason: The genes that lead to read green colour blindness are on the X-chromosomes

Given below is the representation of amino acid composition of the relevant translated portion of beta -chain of haemoglobin, related to the shape of human red blood cells. (a) Is this representation indicating a normal human or a sufferer from certain related genetic disease? Give reason in support of your answer. (b) What difference would be noticed in the phenotype of the normal and the sufferer related to this gene? (c) Who are likely to suffer more from the defect related to the gene represented the males, the females or both males and females equally? And why?

A2Z-PRINCIPLES OF INHERITANCE AND VARIATION-SECTION C: PREVIOUS YEARS' EXAMINATION QUESTIONS (NEET/AIPMT Questions)
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