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kirill115 [55]
3 years ago
8

Crossing over happens in what stage of meiosis exactly?

Biology
2 answers:
Nitella [24]3 years ago
5 0
There are several stages but the crossing over starts on the second stage. And the actual crossing sides happens on the following stage. Hope this helped :)
marshall27 [118]3 years ago
4 0

Answer:

In prophase stage, nearly to the metaphase.

Explanation:

Remember meiosis is the process in which the cell will divide and at the end will be 4 new cells with the half of genes each one. So at the begging of the process ( in the interphase) the cell will start to collect all the compounds, nutrients, etc. to duplicate its genetic information. The next stage ( the prophase), the cell will duplicate and recombine their genetic information ( that means cross over). In the next stage ( the metaphase), the four tetrads (the four similar genes that were duplicate), they start to align in the spindle fibers to start the first cell separation.  

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Option 3 and 4 are most likely correct

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<em>Option 3</em>: We know that area 1 would contain heavy streaking and not single colonies. Therefore, if the loop crosses area 3 and enters area 1, it will definitely result in heavy streaking again.

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