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problem 1) Define the terms:

i) Heterochromatin.

ii) Synaptinemal complex.

iii) Lamp-brush chromosomes.

iv) Amphidiploids.

v) Complementary gene action.

vi) Cytoplasmic male sterility.

vii) Inportance of plant introduction.

viii) Recurrent selection.

problem 2) describe the ultra structure of nucleolus and its organization; how is it involved in the synthesis of r-RNA.

problem 3) Define karyotype? How is it studied? Add the note on the significance of banding techniques in it.

problem 4) prepare briefly on different inversion heterozygotes and their meiotic behaviour.

problem 5) What are autopolyploids? describe the meiotic behaviour of an autotriploid.

problem 6) prepare the essay on the chromosomal theory of sex determination in plants and animals.

problem 7) What is a mutagen and how are they classified? Describe the mode of action of any two mutagens you have studied.

problem 8) prepare briefly on breeding methods of self pollinated crop.

problem 9) What do you mean by hybridization? Describe the methods used in plant breeding with their significance.

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  • Category:- Biology
  • Reference No.:- M95025

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