File Details:

{"filename":"bsc-1-sem-ag-botany-elements-of-genetics-11143-dec-2019.pdf","description":"This file contains the B.Sc. First Semester (Agriculture) examination paper for Botany, Elements of Genetics (D-193) from December 2019. It includes questions on chromosomal changes, DNA and RNA structure, Mendel's laws, multiple alleles, meiosis, Mendel's seven traits, lethal factors, and genetic hypotheses."}

Questions:

  1. Describe various numerical changes in chromosome number with illustration.
  2. Differentiate between the following: (i) Homozygous and Heterozygous, (ii) Linkage and Crossing over, (iii) Incomplete dominance and Co-dominance, (iv) Gene and Allele.
  3. Give a description of the structure of Deoxyribonucleic Acid (DNA) and compare it with that of Ribonucleic Acid (RNA).
  4. Describe Mendel's first law of heredity.
  5. What do you mean by multiple alleles? Give a brief account of multiple allelism.
  6. Describe various substages of Prophase I of meiotic cell division. Give significance of meiosis.
  7. Enlist all the seven characters and their traits studied by Mendel.
  8. Write a short note on lethal factors.
  9. Explain multiple factor hypothesis.
  10. What is complete linkage?
  11. Define test cross.
  12. What is a metacentric chromosome?
  13. What is colchicine?
  14. Define ribosomes.
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