MCQ
Recombination of genes occurs at:
- AProphase of mitosis
- BProphase I of meiosis
- CMetaphase II of meiosis
- DProphase II of meiosis
Explanation:
Recombination occurs when two molecules of DNA exchange pieces of their genetic material with each other, resulting in the production of a new combination of alleles. Genetic recombination occurs in the pachytene stage of prophase I of meiosis during a process called as synapsis.
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Column $A$ Column $B$
(i) Oncogenes (1)Causes $AIDS$
(ii) Single circular $DNA$ (2)Lac-Operon concept
(iii) Splicing (3) Component of bacterial chromosome
(iv) Jacob and Monad (4) Processing of $mRNA$ molecules
(5) When activated cause cancer
$(i) (ii) (iii) (iv)$ respectively