Question

Match the substages of prophase I of first meiotic division listed in column I with the important events pertaining to respective stages given under column II; choose the answer which gives the correct combination of alphabets of the two columns:

$\begin{array}{cccc}& \text{Column I Substages of prophase I}& & \text{Column II Important events}\\ \text{A}& \text{Zygotene}& \text{p}& \text{Chromomeres}\\ \text{B}& \text{Pachytene}& \text{q}& \text{Bivalents migrate to periphery}\\ \text{C}& \text{Diplotene}& \text{r}& \text{Terminalization of chiasmata begins}\\ \text{D}& \text{Diakinesis}& \text{s}& \text{Crossing over}\\ & & \text{t}& \text{Synapsis}\end{array}$

• A. A = t, B = s, C = r, D = q
• B. A = p, B = s, C = r, D = q
• C. A = s, B = p, C = r, D = q
• D. A = s, B = t, C = r, D = q

Answer 1

The correct option is A

A = t, B = s, C = r, D = q

Zygotene - synapsis
Pachytene - crossing over
Diplotene - Terminalization of chiasmata begin
Diakinesis - Bivalents migrate to periphery