BABSc, B.Com & BCA Questions _III - Nalanda Open University

Nalanda Open University
Annual Exam-2010,
Bachelor of Science (Botany) Hons, Part-III
Paper-VIII (Genetics)
Time: 3Hrs Full Marks: 75
Answer any five questions. Question no. 1 is compulsory.
All questions are of equal marks.
1. Multiple Choice Questions:
(xlvi) A ratio of 9:3:3:1 is modified in inhibitory factors to:-
(a) 15:1 (b) 9:7 (c) 12:3:1 (d) 13:3
(xlvii) Genes, which in homozygous conditions results in a non-viable progeny is called as:-
(a) Duplicate gene (b) Linked gene (c) Lethal gene (d)
Epistatic gene.
(xlviii) The duplicate factors show the ratio:
(a) 9:7 (b) 15:1 (c) 13:3 (d) 9:6:1
(xlix) Additive factors or polymerism contain modified ratio as:-
(a) 1:4:6:4:1 (b) 9:6:1 (c) 9:3:4 (d) 12:3:1
(l) Datura is a classic example of:-
(a) trisomy (b) triploid (c) monosomy (d) monoploid
(li) Allopoyploid is:-
(lii)
(a) intraspecific (b) interspecific (c) both (d) none
Down's syndrome in human beings is due to:-
(a) monosomy (b) nullisomy (c) triploidy (d) trisomy
(liii) If haploid number of chromosome is 10, what is the tetrasomic no:-
(a) 10 (b) 20 (c) 22 (d) 40
(liv) If haploid number of chromosomes in a cell is 12, the monosomic number will be:-
(a) 24 (b) 25 (c) 23 (d) 21
(lv)
The bread wheat, Triticum aestivum is:-
(a) haploid (b) diploid (c) tetraploid (d) hexaploid
(lvi) Genetic code is:
(a) Universal (b) Degenerate (c) Non-overlapping
(d) Commaless (e) All of the above
(lvii) Genetic engineering aims at:
(a) Destroying wild genes
(b) Preserving
wild gene
(c) Curing human disease by troducing new genes
(d) None of the
above
(lviii) Which of the following techniques is used by forensic Scientists in crime detection?
(a) DNA Sequencing (b) DNA nicking (c) Gene therapy (d) DNA finger
printing
(xiv) The technique of artificial synthesis of a new gene and its successful transplantation
in the genome of a component organism comes under the perview of:
(a) Gene therapy
counselling
(c) Genetic Engineering
printing
(xv) Which of the following is an 'ochre'codon?
(a) UAA (b) UAG (c) UGA (d) AUG
(b) Genetic
(d) DNA finger
2. Describe the type and cause of chromosomal disease in man.
3. What is genetic counselling? Discuss its significance and role in human life.
4. Write short notes on
(a) aneuploidy (b) euploidy
5. What is genetic code? Describe the characteristic of genetic code. What are initiator
and non- sense codon?
6. What are mutagen? Discuss the mutagenic action of some chemical and physical
mutagen.