Name the stage of cell cycle at which one of the following events occur:
(i) Chromosomes are moved to spindle equator
(ii) Centromere splits and chromatids separate
(iii) Pairing between homologous chromosomes takes place
(iv) Crossing over between homologous chromosomes takes place

Mutual exchange of genetic material between homologous chromosomes take place in………………..

Match column I with column II and select the correct option from the given codes. {:("Column I","Column II"),("Chromosomes move to equator",(i)"Pachytene"),("Centromere splits and ",(ii)"Zygotene"),("Pairing between homologous chromosomes",(iii)"Anaphase"),("Crossing over between homologous chromosomes",(iv)"Metaphase"):}

In ________ , recombination/crossing over occurs between homologous chromosomes.

Given diagram shows a pair of homologous chromosomes during meiosis Maximum crossing over will occur between genes

Analyse the events during every stage of cell cycle and notice how the following two parameters change (i) Number of chromosomes (N) per cell (ii) Amount of DNA content (C) per cell Answer

Which of the following statement (s) is/are wrong respect to Recombination process ? (i) Mitotic crossing over occurs rarely in somatic cells . (ii) Syndesis refers to pairing of non - homologous chromosome. (iii) Procentric synapsis starts from telomeres. (iv) A Bivalent has four telomeres.

In which of the following , no change in mass number of the daughter nuclie takes place ? (i) alpha decay (ii) beta decay (iii) gamma decay (iv) neutron decay

Which of the following is/are correct ? (i) Chain reaction takes place in a nuclear reactor and an atomic bomb. (ii) The chain reaction in a nuclear reactor is controlled. (iii) The chain reaction in a nuclear reactor is not controlled. (iv) No chain reaction takes place in an atom bomb.