Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
Which one is correct about crossing over/genetic
recombination?
(i) It occurs in tetrad stage which occurs in pachytene
of prophase I of meiosis I.
(ii) It occurs between non-sister chromatids of
homologous chromosomes.
(iii) It is recombinase enzyme mediated process.
(iv) It is also the reciprocal transfer of genes between
the non-homologous chromosomes
(a) All of the above (b) All except (iv)
(c) (ii), (iii) and (iv) (d) (iii) and (iv)
Answer:
(b) Crossing over leads to recombination between homologous chromosomes. Recombination is the rearrangement of genetic information within and among DNA molecules
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