Question

Match the following stages during Prophase I with their key changes:

$$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{i. Leptotene}& \text{a. Bivalents separate and remain attached at Chiasmata.}\\ \text{ii. Zygotene}& \text{b. Pairing of opposite chromosomes.}\\ \text{iii. Pachytene}& \text{c.Bivalents divide and remain attached at Chiasmata.}\\ \text{iv. Diplotene}& \text{d. Bivalents are formed and crossing over is seen.}\\ \text{v. Diakinesis}& \text{e. Chromosomes are formed and in condensed stage.}\end{array}$$

• A. i).➡ b., ii).➡ c., iii).➡ d., iv). ➡ e., v). ➡ a.
• B. i).➡ d., ii).➡ b., iii).➡ e., iv). ➡ a., v). ➡ c.
• C. i).➡ c., ii).➡ d., iii).➡ a., iv). ➡ b., v). ➡ e.
• D. i).➡ a., ii).➡ e., iii).➡ c., iv). ➡ d., v). ➡ b.

Answer 1

The correct option is A

i).➡ b., ii).➡ c., iii).➡ d., iv). ➡ e., v). ➡ a.

The correctly matched pairs of phases in Prophase I division with their key changes are:

(e) As chromosomes are formed and are in condensed stage it is $\Rrightarrow$ i). Leptotene,

(b) As pairing of opposite chromosomes appear, it is $\Rrightarrow$ ii). Zygotene,

(d) As bivalents are formed and crossing over is seen it is $\Rrightarrow$ iii). Pachytene,

(c) As bivalents divide and remain attached at Chiasmata it is $\Rrightarrow$ iv). Diplotene and

(a) As bivalents are separate and has a part of Chiasma it is $\Rrightarrow$v). Diakinesis.

So the correct options are as follows. -- v).$\to$ a., ii).$\to$ b., iv).$\to$ c., iii). $\to$ d., i). $\to$ e.