Question

How many tetrads are visible in a cell during
pachytene stage of reduction division if there are 20
chromosomes in a meiocyte?
(1) 5
(2) 10
(3) 20
(4) 40​

Answer 1

the answer is option 3.......

Answer 2

Answer:

10 tetrads are visible in a cell.

Option B

Explanation:

In meiosis I, there are five stages of the prophase I. They are leptotene, zygotene, pachytene, diplotene, and diakinesis. In the pachytene stage of the prophase I of meiosis I, the chromosomes form a tetrad.

Tetrads are the stage where the homologous pairs of chromosomes where the crossing over is not yet over and the chromosomes are seen. So, several tetrads corresponds to the half number of chromosomes in a meiocyte, as 2 chromosomes form one tetrard.