Multiple Choice Questions on Cytogenetics

1. Complementary gene produces a phenotypic ratio 

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

2. Nicotiana rustica is an amphidiploid between? 
a) Nicotiana tomentosa and N sylvestris 
b) N sylvestris and N tomentosa 
c) N paniculata and N undulata
d) None of the above

3. Translocation homozygotes lead to alternation in  
a) gene number
b) linkage map
c) sequence of genes
d) linkage group

4. If a dihybrid without genetic interaction is selfed the following ratio is obtained in F2
a) 9:3:3:1
b) 9:3:4
c) 9:7
d) 15: 1

5. A trihybrid plant (Aa, Bb, Cc) on selfing will produce the following numbers of genotype
a) 16
b) 9
c) 27
d) 64
Multiple Choice Questions on Cytogenetics

6. Mutation is known to be due to change in genes
a) loss
b) degeneration
c) addition
d) all of these

7. Triticale is a synthetic allopolyploid, developed from cross between 
a) Triticum aestivum x Secale cereale
b) Triticum turgidium x Secale cereale
c)  Secale cereal x Triticum turgidum
d) None of these

8. Which of the following is not correct?
 Meiosis  & Functions
a)Leptotene - RNA & Protein 
b) Zygotene - Chromosome become shorter and thicker
c) Diplotene - Nucleus increase in size
d) Pachytene - Crossing over take place 

9. Pseudo dominance is associated with 
a) deletion
b) detection
c) duplication
d) translocation

10. Which of the following statements are correct mitosis?
I. The term Mitosis was coined by Flemming in 1882
II. They produce two identical daughter and nuclei from the parent nucleus 
III. Mitosis occurs in somatic cells, it is called somatic cell division 
IV. Segregation and recombination take plan diving mitosis
V.  The whole process of mitosis consists of only one homontyic division 
a) I, II, III and IV
b) II, III and V
c) II, II, IV and V
d) I, II, III and V

1. a) 9:7
2. c) N paniculata and N undulata
3. b) linkage map
4. a) 9:3:3:1
5. c) 27
6. d) all of these
7. d)  None of the above
8. c) Diplotene - Nucleus increase in size
9. a) deletion
10.d) I, II, III and V

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