Sardar Krushinagar Dantiwada Agricultural Uiversity 2010 Bachelor of Veterinary Science & Animal-Husbandary Seventh Sem End of Animal Genetics and Breeding of B.V.Sc& A.H. - Question Paper

Department of Animal Genetics and Breeding
College of Veterinary Science and Animal Husbandry

Semester End exam (Theory)
AGB – 411
Date: 30/11/2010
Time: 10 to 12 AM [Total Marks: 30]


Q. – 1. A. define Mendel's laws of Inheritance. [Marks 2]
B. explain in brief Mendel's experimental methodology to evolve laws of
Inheritance [Marks 4]

Q.- 2. Write short notes (Any Three) [Marks 9]

A. Multiple alleles
B. Mitotic Cell Division
C. Characteristics of Crossing Over and Linkage
D. Chromosomal aberrations

Q. – 3. Fill in the Blanks [Marks 10]
1. The terms "phenotype" and "genotype" were coined by ____________________.
2. The theory of pangenesis was provided by ________________________.
3. The process of reproduction of new cells from the pre existing cells is called ___________________.
4. Mitosis occurs in _______________ cells, while Meiosis occurs in _____________ cells.
5. __________________ chromosomes have centromere located at the terminal end.
6. The organism having 2n number of chromosomes are known as _________________ organism.
7. A fixed position on a chromosome that is occupied by a provided gene or its allele is _____________________.
8. In mammals, ___________________ is heterogametic sex, while in poultry _____________________ is heterogametic sex.
9. An allele that expresses itself at the expense of an alternate allele is called __________________.
10. An allele whose expression is suppressed in the presence of a dominant allele is known as __________________.
11. The dihybrid phenotypic ratio in F2 generation is _________________.
12. Loss of a segment of chromosome ranging from telomere and centromere is known as ___________________ deletion.
13. In ___________________ kind of inversion, centromere is involved.
14. In drosophila fly, sex index (X/A) of super male will be ________________ and super female will be _______________.
15. Conditions which replace 3:1 ratio are ________________ and ______________.
16. Alternative form of gene is called as ______________________.

Q.-4. select an improper ans. [Marks 7.5]

1. No. of chromosomes in the ovum of sheep
a. 60 b. 54 c. 38 d. 64
2. Down syndrome is an example of
a. Monosomy b. Trisomy c. Triploidy d. Polyploidy
3. Outward expression of a trait is
a. Genotype b. Phenotype c. Karyotype d. all of these
4. Colour blindness in human is
a. Sex limited trait b. Sex linked trait c. Sex influence trait d.. None of above
5. The range of crossing over percentage is
a. 100 % b. 50 % c. 0-50 % d. 0-100%
6. The nullisomy is an example of
a. Anuploidy b. Euploidy c. Both d. None
7. The structural change in a chromosome in which a segment is oriented in a reverse
order.
a. Tranlocation b. Duplication c. Deletion d. Inversion
8. The syndrom in which, monosomy of sex chromosome in female is
a. Turner's syndrom b. Down syndrome c. Klinefilter's syndrome d. all of these
9. The criss cross trend of inheritance in
a. Sex limited trait b. Sex linked trait c. Sex influence trait d. None of above
10. The sudden heritable modifications in genetic material is called as
a. Duplication b. Mutation c. Deletion d. None of these
11. Mutation outcomes from replacement of base pair of purine with purine or pyrimidine
with pyrimidine is called as
a. Transition b. Tansversion c. Both of these d. None of these
12. The Coiling trend of Shell in Snail is an example of
a. Extra nuclear inheritance b. Maternal inheritance
c. Cytoplasmic inheritance d. all of above
13. The sex index (X/A) value is 0.5 shows
a. Nomal male b. Nomal female c. Super male d. Super female
14. Genotype of purebred Pea combed birds is
a. RrPp b. RRpp c. rrPP d. rrpp
15. The phenotypic ratio of recessive epistasis is
a. 9:3:4 b. 9:7 c. 12:3:1 d. 15:1

Q.-5. State whether the subsequent statements are actual or False [Marks 7.5]
Answers
1 The theory of acquired character was provided by Weismann.
2 In linked gene pairs, members of every gene pair segregate out at time of gamete formation.
3 The preformation theory was provided by Swammerdam and Bonnet.
4 Chiasma formation seen in Metaphase stage of meiosis.
5 Loss of terminal segment of a chromosome is known as interstitial deletion.
6 The daughter cells contain half the chromosome number of mother cell during end of mitosis.
7 The inverted segment during inversion is rotated to a full 180°.
8 Exchange of segments ranging from non homologous chromosomes is known as reciprocal translocation.
9 The klinefilter's syndrome always occurs in female.
10 Allosomes and Sex chromosomes are same
11 ZW ZZ female male system is the sex determination system of Human.
12 The Feather shank is an example of duplicate dominance epistasis.
13 The daughter of bald mother is always bald.
14 When carrier woman for colorblind marries a normal man, all daughter progenies are normal.
15 The inter-allelic interaction is Dominance.

Q.- 6. Match the subsequent (write down answers of B in bracket) [Marks 7.5]
A. B.
1. 'Genetics' term ( ) A. Fleming
2. Paracentric inversion ( ) B. Universal donor
3. DNA Structure ( ) C. Cattle
4. Paricentric inversion ( ) D. Barred feather in poultry
5. Holendric gene ( ) E. Pachytene
6. PCR ( ) F. Universal acceptor
7. Synapsis ( ) G. Watson and Krick
8. 60 chromosome ( ) H. Centromere involved
9. 78 chromosome ( ) I. Egg production
10. Mitosis ( ) J. Y chromosome
11 AB blood group ( ) K. Kary B. Mullis
12 O blood group ( ) L. Centromere not involved
13 Sex limited character ( ) M. Baldness
14 Sex influence character ( ) N. William Bateson
15 Sex linked character ( ) O. Dog
Q.- 7. Define/ discuss the followings (any five) [Marks 2.5]

1. Anuploidy:

2. Mandel's legal regulations of Segregation:

3. Coupling phase:

4. Linkage

5. Heterozygote:

6. Euploidy:

Earning:   Approval pending.