CSIR NET Life Sciences December 2008 Paper (Part 10 of 14)

  1. A plant with genotype r + h +/r-h-was test crossed. Out of total 280 progeny 260 are r + h +/r-h-and r-h-/r-h-. The recombination frequency will be

    1. 9

    2. 8 2.46. 4

    3. 7.2

    4. 3.6

  2. Genetic mapping reveals that distance between two genes ‘A’ and ‘B’ is 10 cM. What is chance of getting Aabb progeny if AaBb is test crossed?

    1. 5 %

    2. 10 %

    3. 45 %

    4. 90 %

  3. The regulators of circadyn rythms in plants is

    1. Phycobillins

    2. Phytochromes

    3. Phototropins

    4. Cryotophores

  4. The following pedigree represents the inheritance of a rare disorder. Based on the above pedigree, what is the most likely mode of inheritance?

    1. Autosomal dominant

    2. X-linked recessive

    3. X-linked dominant

    4. Autosomal recessive

  5. Quantitative inheritence defines

    1. Variation in phenotype

    2. Variation in genotype

    3. Variation in enviornment

    4. Variation in genes

  6. Which of the following which is not intrinsic flour

    1. Tryptophan

    2. Phenyl alanine

    3. Tyrosine

    4. Histidine

  7. Among the following which group has maximum number of endangered and critically endangered species as per IUCN red data list?

    1. Amphibian

    2. Reptile

    3. Mammals

    4. Aves

  8. Germination of moth bean in dark is an example of

    1. Photomorphogenesis

    2. Skotomorphogenesis

    3. de-etiolation

    4. Shadding effect

  9. Birds besides lungs have highly branched air sacs. The major function of air sac is to

    1. Increase surface area for gas exchange

    2. Help in ventilation during inhalation

    3. Help in ventilation during exhalation

    4. Help in ventilation during both inhalation and exhalation

  10. Which is correct hierchical sequence in taxonomy?

    1. PhylumClassOrderFamilyGenus

    2. Class-Phylum-Order-Family-Genus

    3. Phylum-Class-Family-Order-Genus

    4. Phylum-Class-Order-Genus-Family