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)

 

 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

 Meiosis Case study

( All MCQs from NCERT & Important points and explanations from NCERT)

👆