GPB - 502 (2+1) Principles of Cytogenetics

 

UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR
COLLEGE OF AGRICULTURE, RAICHUR
GPB 502 (2+1) Principles of Cytogenetics
Qualifying Exam
Max. Marks: 12

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Q. I Fill in the blanks

(0.5 × 12 = 6.00)

1. Differential staining behavior of chromatids is known as Heteropycnosis

2. Spindle fibers attach all along the length of Holocentric chromosomes

3. Ring chromosomes are mitotically stable and meiotically unstable

4. C-value represents the amount of DNA found in haploid genome which is measured in pg/mbp

5. Origin of trisomies is may due to non-disjunction and asynapsis of non-homologous chromosomes

6. Cytological events like formation of Univalents indicate haploidy

7. Acentric chromosomes forms ‘3’ shape during Anaphase

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Q. II Define / Answer briefly

✔ Melting temperature
✔ Heterogametic sex
✔ Hyperchromicity
✔ Crossing over
✔ Segmental allopolyploids
✔ Iso-chromosomes