The longest phase of Meiosis I is __________ and it has _ subphases.

Interphase I & 2.

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Prophase I & 5.

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Metaphase I & 3.

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Anaphase I & 4.

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Solution

The correct option is B
Prophase I & 5.

The longest phase of Meiosis I is Prophase I and it has 5 subphases namely,

1.Leptotene

2.Zygotene

3.Pachytene

4.Diplotene and

5.Diakinesis.

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Question 2

At which stage of meiosis does the genetic constitution of gametes is finally decided
(a) Metaphase-I
(b) Anaphase-II
(c) Metaphase-II
(d) Anaphase-I

\begin{matrix} List I & List II (Phase of meiosis) & (Event that occurs) 1 & Prophase I & Crossing over occurs 2 & Metaphase II & Sister chromatids migrate to opposite poles 3 & Anaphase I & Homologous chromosomes line up at equator in pairs \end{matrix}

Regarding the assertion and reason; choose the correct option_____.

Assertion [A]: Prophase I of Meiosis I is the longest phase during the formation of gametes.

Reason [R]: It has five sub stages Leptotene, Zygotene, Pachytene, Diplotene and

Diakinesis; during which the number of chromosomes are doubled.

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