B.Sc. II Semester – III,GENETICS – I Mendelian & Population Genetics,Solapur University Question Paper, 2014 Question Paper

Solapur University Question Paper

B.Sc. II Semester – III (Biotechnology) Examination, 2014

GENETICS – I

Mendelian & Population Genetics

Day and Date : Wednesday, 21-5-2014 Total Marks : 50

Time : 3.00 p.m.to 5.00 p.m.

Instructions: 1) All questions are compulsory.

2) Draw neat & labeled diagram wherever necessary.

3) Figures to the right indicate full marks.

1. Rewrite the following sentences by choosing correct alternative. 10

1) The genotype of the F1 heterozygous tall plant is ________

a) TT b) Tt

c) tt d) none of the above

2) How many pairs of contrasting characters in pea plant were choosen by Mendel ?

a) 2 b) 3 c) 4 d) 7

3) In inhibitory gene action F2 progenics remain in ________

a) 9 :7 b) 9 :3 :4 c) 13 : 3 d) 15 :1

4) Crossing over involves ________

a) deletion of chromosome b) addition of chromosome

c) exchange of genetic material d) mutation

5) Universal recipient belongs to the blood group ________

a) O b) A c) B d) AB

6) Chromosomes of higher plants are made up of ________

a) DNA + Histones b) DNA only

c) RNA + DNA d) DNA +pectines

7) Balbiani rings occur in _______

a) Lampbrush chromosome b) heterosome

c) allosome d) polytene chromosome

Seat

No.

8) A trisomic individual has a chromosome no. of ________

a) 2n +1 b) 2n – 1 c) 2n + 3 d) 2n +2

9) The effects of natural selection may be countered by ______

a) gene flow b) genetic drift c) mutation d) inbreeding

10) In ______ inversion, contains the centromere within the inverted segment.

a) pericentric b) paracentric c) acentric d) acrocentric

2. Answer any five of the following. 10

1) Define epistasis.

2) Define interaction of gene.

3) Define linkage.

4) What is test cross ?

5) What is plasmid ?

6) Define gene frequency.

3. A) Answer any two of the following. 6

1) Explain with suitable example co-dominance.

2) Describe mitochondrial inheritance.

3) Describe polytene chromosome.

B) Explain with suitable example law of independent assortment. 4

4. Answer any two of the following. 10

1) Describe inhibitory gene action.

2) What are multiple alleles ? Explain ABO blood group systerm in human.

3) Explain in detail euploidy.

5. Answer any two of the following. 10

1) Explain the mechanism of crossing over.

2) Describe Hardy-Weinberg Law.

3) Describe genetic basis of evolution in wheat.

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