M.Sc. (Semester (CBCS) Examination Nov/Dec-2018
GENETICS
CONCEPTS OF GENETICS
Time: 2½ Hours Max. Marks: 70
Instructions: Figures to the right indicate full marks.
Draw a neat, well labeled, complete diagram wherever necessary.
Use of calculators, cell phones, or any other electronic gadgets is prohibited
All questions are compulsory.
Q.1 Rewrite the sentences by choosing correct answer from given alternatives: 14
The individual having one chromosome extra to diploid genome are called

nullysomy trisomy
tetrasomy monosomy
Holandric genes located on
X chromosome Y chromosome
autosome None of the above
The number of chromosome in Drosophila melanogaster is
six eight
ten twelve
The sex chromosome in human male are known as
XX XY
XO XZ
The blood group in man was discovered by
Bateson Stern
Landsteiner East
genes are present on homologous part of chromosome
which passed directly from father to son.
Hemophilia Holandric
Hologenic Diandric
Polytene chromosomes first time observed by
Balbiani Painter
Bridige Both a and b
Which law of Mendel is universally applicable?
Law of dominance Law of segregation
Law of independent assortment Law of unit factor
In incomplete dominance of four o'clock plant, F1 plants are pink in colour due
to
dominant trait recessive trait
both alleles express partially mixing of factors
10) If blood group is AB, the alleles present will be
IA and IB IB and i
IA and i IA and IA
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11) In incomplete dominance in case of Snapdragon, the genotypic and
phenotypic ratio in monohybrid cross is as follows:-
Phenotypic and genotypic ratio 1 2 1
Phenotypic ratio 3 1 and genotypic ratio 1 1
Phenotypic ratio 1 1 and genotypic ratio 1
Phenotypic and genotypic ratio 3 1
12) The test cross ratio for monohybrid cross is if the one of the
parents is heterozygous.
1 2 1 2
1 1 All offspring of same type
13) 'Gametes are never hybrid' this is a statement of law of
Dominance Segregation
Random fertilization Independent assortment
14) Sickle cell anemia as a trait is an example of
Multiple alleles Incomplete dominance
Codominance Pleiotropy
Q.2 Answer the following (Any
1. What is test cross?
2. What is Base excision repair
3. What is Non homologous end joining (NHEJ)
4. Define multiple alleles.
5. What is Mismatch repair
08
Write notes on (Any
1. What is linkage group?
2. What are the types of Mutation?
3. What are types of Linkage?
06
Q.3 Answer the following (Any
1. Give significance of Meiosis.
2. What is incomplete dominance? Explain with example.
3. Describe types of crossing over.
08
Answer the following (Any
1. Explain general outline of genome of Drosophila.
2. Explain types of mutagenic agents.
06
Q.4 Answer the following (Any
1. What is Polyploidy? What are different kinds of polyploidy?
2. Explain with suitable example Mendel's Law of Dominance.
3. Give an account on Drosophila a model for genetic study.
10
Answer the following (Any
1. Describe Quantitative inheritance.
2. Explain describe colour blindness in man.
04
Q.5 Answer the following (Any Two) 14
Describe significance of polyploidy.
Describe intra chromosomal aberrations.
Describe different stages of Mitosis with labeled diagram.