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Independent genes that copy other genes ...

Independent genes that copy other genes so as to produce a similar effect are called

A

lethal genes

B

Duplicate genes

C

Complementary genes

D

None of the above

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The correct Answer is:
B
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The amount of energy released when an electron is added to an isolated gaseous atom to produce a monovalent anion is called electron affinity or first electron affinity or electron gain enthalpy. The first electron is given a negative sign as the addition of an electron to a neutral atom is an exoergic process. The addition of electron to A^(-1) requires energy to overcome the force of repulsion. Thus, the second electron affinity is an endoergic process. The magnitude of electron affinity depends on a number of factors such as (i) atomic size (ii) effective nuclear charge (iii) screening effect (iv) half and fully filled orbitals and (v) shape of orbital. In general, electron affinity increases as the atomic radii decrease in a period. However, there are exceptions when the atoms have stable configurations. In a group, electron affinity decreases as the size increases. However, the members of 3rd period have somewhat higher values than the members in the 2nd period of the same subgroups. Which of the following species has the highest electron affinity?

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AAKASH SERIES-PRINCIPLES OF INHERITANCE AND VARIATION-EXERCISE -II
  1. Cis-trans expression of genes is an example of

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  2. In genetic crosses showing recessive eipstaiss such as mice coat colou...

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  3. Independent genes that copy other genes so as to produce a similar eff...

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  4. Chromosome map is useful for

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  5. The percentage rof recombination involving th seed shape and seed colo...

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  6. Genetic map is one that

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  7. Distance between the ganes and prcentage of recombination shows.

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  8. The type of gene mutation that involves the replacement of purine with...

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  9. Mutations induced by 5-bromo uracil are

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  10. Given below is the representation of a kind of chromosomal mutation: ...

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  11. Inversion without involving the centromere is called

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  12. Asneuploidy which results in the loss of a complete homologous pair of...

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  13. Crtoplasmic male sterlity in maize is due to defective

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  14. Duplication of same gemome leads to

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  15. Which of the following will cause a more effective mutation?

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  16. Recessive mutations are expressed normally in

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  17. If the above noral gene sequence changes to ABCABCDEFGH, then has occu...

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  18. In gene mutations when a purine is substitde by another purine it is c...

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  19. If a part of gene is totally missing, it is called

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  20. Conditions of a karyotype 2n+-1 and 2n+-2 are called

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