Multiple Choice Questions

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In angiosperms, microsprogenesis and megasporogenesis

  • occur in anther

  • form gametes without further divisions

  • Involve meiosis

  • Involve meiosis


C.

Involve meiosis

Both event microsporogenesis and megasporogenesis involve the process of meiosis which results in the formation of haploid gametes from the microspore or megaspore mother cells. 

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Flowers are unisexual in

  • Pea

  • Cucumber

  • China rose

  • China rose

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In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree. 

  • Autosomal dominant

  • X-linked recessive

  • Autosomal recessive

  • Autosomal recessive

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The cutting of DNA at specific locations become possible with the discovery of

  • Restriction enzymes

  • Probes

  • Selectable markers

  • Selectable markers

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Ectopic pregnancies are referred to as

  • Pregnancies with genetic abnormality

  • Implantation of embryo at site other than uterus

  • Implantation of defective embryo in the uterus

  • Implantation of defective embryo in the uterus

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Balbiani rings rigs are sites of

  • Lipid synthesis

  • Nucleotide synthesis

  • Polysaccharide synthesis

  • Polysaccharide synthesis

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Which of the following pairs is not correctly matched?

  • Mode of reproduction                               Example
    Offset                                                        Water hyacinth

  • Mode of reproduction                               Example
    Rhizome                                                     Banana
  • Mode of reproduction                                       Example 
    Binary fission                                                      Sargassum 
  • Mode of reproduction                                       Example 
    Binary fission                                                      Sargassum 
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In his classic experiments on pea plants, Mendel did not use

  • Seed colour

  • Pod length

  • Seed shape

  • Seed shape

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Which of the following immunoglobulins does constitute the largest percentage in human milk?

  • lgD

  • lgM

  • lgA

  • lgA

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A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?

  • 0.5

  • 1

  • Nil

  • Nil

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