Out of $8$ ascospores formed in Neurospora, the arrangement is $2 a : 4 A : 2 a$ showing.

No crossing over

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Some meiosis

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Second generation division

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First generation division

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Solution

The correct option is C Second generation division
In Neurospora after crossing over between the gene and centromere, the paired arrangement of ascospores is AA aaaa AA or 2a : 4a: 2a. This is known as second division segregation.

So, the correct answer is 'Second generation division'.

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^{+}

^{+}

8

4

2 a + \frac{1}{2 a} = 8

4 a^{2} + \frac{1}{4 a^{2}}

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