Microtubules from opposite poles of the spindle attach to the pairs of homologous chromosomes during

(1) Pachytene               

(2) Metaphase – I

(3) Metaphase – II         

(4) Early prophase

Exchange of genetic material between two homologous chromosomes occurs in

How many meiotic divisions are required to produce 50 wheat grains?

A typical eukaryotic cell cycle is illustrated by human cells in culture. These cells divide once in approximately every
1. 24 hours                  
2. 90 minutes
3. 20 minutes               
4. 9 hours

Choose incorrect statement with respect to cell cycle

Choose the correct sequence with respect to  different phases of cell cycle

Human nerve cells do not divide after birth and they remain throughout their life in which phase of cell cycle?

Various phases of cell cycle are controlled by

Amount of DNA and Number of chromosomes in G₂ phase of cell cycle would be

Exchange of genetic material between non-sister chromatids of homologous chromosomes in pachytene stage is facilitated by