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Earn 100

Knowing that albinism is determined by a recessive gene in man; the presence of albinism in children born to a couple proves that:

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Important Questions on Principles of Inheritance and Variation

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A normal woman whose father was albino, marries an albino man, what proportion of normal and albino are expected among their offsprings?
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As a result of marriage of curly hair mother and straight hair father, 8 children are born. The ratio of curly and straight hair will be ?
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Transition type of gene mutation is caused when
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Match List I with List II and select the correct answer using the code given below
 

List-I (Syndrome)

  List-II (Chromosomal abnormality)

(1) Patau's syndrome

(A) 44 + XXY = 47

(2) Klinefelter's syndrome  (B) 44 + XO = 45
(3) Down's syndrome (C) 46 + 1 = 47, (trisomy 13)
(4) Turner's syndrome   (D) 46 + 1 = 47, (trisomy 21)

 

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Assertion : The DNA fingerprinting is the same for every cell, tissue and organ of a person.

Reason : DNA fingerprinting is used for treatment of inherited disorders like Huntington's disease, Alzheimer's and Sickle cell anaemia.

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Assertion : If pollen mother cells has 42 chromosomes. The pollen has only 21 chromosomes.

Reason : Pollens are formed after meiosis in pollen mother cell.