Question

How many tetrads are visible in a cell during pachytene stage of reduction division of there are 20 chromosomes in a meiocyte?

• A. $5$
• B. $10$
• C. $20$
• D. $40$

Answer 1

The correct option is B $10$

A pair of homologous chromosomes is called bivalent. These are formed in zygotene stage. During pachytene, in each bivalent four chromatids appear. it is called pachytene tetred. If a meiocyte contains 20 chromosomes, in pachytene 10 pachytene tetreds will appear.

So, the correct option is '10'