In Neurospora a cross between the genotypes 'A' and 'a' results in an ascus with ascospores of genotypes as shown below: 

Ascus Class	Ascospore
I	A	A	A	A	a	a	a	a
II	A	A	a	a	a	a	A	A

 Statements A to D are events that could have occurred during meiosis.

A) Class I is results of no crossing over between the centromere and gene.

B) Class II is results of single crossing over between the centromere and gene

C) Class I shows segregation of alleles 'A' and 'a' in meiosis II

D) Class II shows segregation of alleles 'A' and 'a' in meiosis II

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#Question id: 12477

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What structures would neurobiologists look for if they are interested in determining if an animal can see in color?

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