If a haemophilic female who marries a normal male gives birth to a male child, then what are the chances of boy being normal? (a hypothetical situation but it won’t happen practically)

 (1) 0%

 (2) 50 %

 (3) 25%

 (4) 75%

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In ABO blood grouping how many genotypes show co-dominance? 

(1) 1

(2) 2

(3) 3

(4) 4

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Pedigree analysis is not utilized to trace

(1) Specific trait

(2) Sex ratio

(3) Disease

(4) Abnormality

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Which of the following symbols represent consanguineous mating? 

(1)

(2)

(3)

(4)

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In the given pedigree chart select the correct statement:

(1) A & B are twins

(2) A is younger than B

(3) B is younger than A

(4) Can’t determine the age of A & B

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Which of the following is the sex linked disease? 

(1) Sickle cell anaemia

(2) Haemophilia

(3) Cystic fibrosis

(4) Phenylketonuria

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Mendelian disorders are caused by

(1) Mutation in the single chromosome

(2) Mutation in the single gene

(3) Polyploidy

(4) Aneuploidy

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Myotonic dystrophy is

(1) Autosomal recessive trait

(2) Autosomal dominant trait

(3) X- linkeddominant trait

(4) X- linked recessive trait

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Boy born to a physically normal couple has been diagnosed with a genetic disorder, this could be

(1) Y- linked trait.

(2) Autosomal dominant trait

(3) X- linkeddominant trait

(4) X- linked recessive trait

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Which of the following disorder is associated with Queen Victoria?

(1) Sickle cell anaemia

(2) Haemophilia

(3) Huntington's Disease

(4) Myotonic dystrophy

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