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Principles of I...

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  • Question 1
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    The question consists of two statements, assertion (A) and reason (R). To answer this question, choose any one of the following responses.

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    Assertion: Human beings are not suitable for controlled breeding experiments to study the inheritance of human traits.
    Reason: Human beings are considered one of the most advanced species with a cranial capacity of 1450 cubic centimeters.

  • Question 2
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    Match the following:
     

    a. Down's syndrome 1. It is caused by an extra 18th chromosome and is characterised by sloping chin, broad ears and mental retardness.
    b. Edward's syndrome 2. It is caused due to an extra 13th chromosome and is characterised by cleft palate and hard lip.
    c. Patau's syndrome 3. It is caused due to an extra 21st chromosome and is characterised by opened mouth, flattened nose and short ears.

  • Question 3
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    Which of the following is caused by XXY genotype?

  • Question 4
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    Recessively inherited traits are caused by recessive genes in homozygous condition. Which of the following recessively inherited traits is caused due to the absence of homogentisic acid oxidase enzyme?

  • Question 5
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    Match the following:

    Common name Biological name Chromosome number
    a. Sweet pea 1. Zea mays p. 20
    b. Maize 2. Lathyrus odoratus q. 24
    c. Rice 3. Oryza sativa r. 14

  • Question 6
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    The addition or deletion of one or more chromosomes in a set is called

  • Question 7
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    Loss of one chromosome from one set is called

  • Question 8
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    Chiasmata formation in Drosophila

  • Question 9
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    Which of the following chromosome numbers is present in a trisomic individual?

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