genetics, evolution of life & ecological biodiversity - Category wise Question and Answer Practice Test with Solutions

genetics, evolution of life & ecological biodiversity PRACTICE TEST [5 - EXERCISES]

set 1

set 2

set 3

set 4

set 5

Question : 16

Whittaker is famous for

a) Five kingdom classification

b) Two kingdom classification

c) Four kingdom classification

d) Distinguishing in Bacteria & Blue green algae

Answer: (a)

Question : 17

Consider the following statements :

  1. Mirabilis is an exception to Mendel’s principle of dominance.
  2. Mendel’s second law is the law of segregation.
  3. Mendel’s law of independent assortment is based on F2 ratio of 9 : 3 : 3 1.
Which of the statement(s) given above is/are correct about Mendel’s law?

a) 1 and 3

b) 2 only

c) 1 only

d) 1, 2 and 3

Answer: (d)

Incomplete dominance and Co-dominance are non-Mendelian genetic characteristics. Mendel’s second law is the law of independent assortment of segregation. It is based on the F2 ratio of 9 : 3 : 3 : 1

Question : 18 [UPPCS (Pre) 2005]

The mutation theory of evolution was enunciated by

a) Lamarck

b) Huxley

c) Darwin

d) Hugo de Vries

Answer: (d)

Question : 19

Insects have

a) 4 pairs of legs

b) 2 pairs of legs

c) 3 pairs of legs

d) 1 pair of legs

Answer: (c)

Class insecta has 3 pairs of legs located on the thoracic segments. It is the characteristic feature of class Insecta.

Question : 20

Consider the following statements :

  1. Polytene chromosomes found in salivary gland of larva of Drosophila and Chironomus larva.
  2. They were Discovered by Balbiani.
  3. They were characterized by presence of puffs and Balbiani rings
  4. These chromosomes are attached by chromocentre.
Which of the statements given above are correct about polytene chromosomes?

a) 2 only

b) 2 and 3

c) 1 and 2

d) 1, 2, 3 and 4

Answer: (d)

Polytene chromosomes are over-sized chromosomes which have developed from standard chromosomes and are commonly found in the salivary glands of Drosophila melanogaster. These were originally observed in the larval salivary glands of Chironomus midges by Balbiani in 1881. Many balbiani rings and puffs are a part of these chromosomes.

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