Question

Were all ascospores of the same color _____________________ if not, how did the colors become mixed.

Answer 1

No, all ascospores are not of the same color.

It is produces in black spores and has a mutant variety that is tan colored.

The wild type (+), which creates a dark spore, is the one that is most frequently observed in nature.

Which alleles in Sordaria result in the color black in their spores?

• Melanin formation is the cause of the color black.
• Several genes contribute to the creation of black color, however the two most prevalent ones are the tan spore gene and the gray spore gene.
• One gene determines the color of the spores.

Why do we split the events of the Sordaria cross over by two?

• Each crossover results in the production of two spores that are identical to the parents' spores and two additional spores.
• As only half of the spores in each ascus result from crossing across, you must divide the number of asci counted by two to get the number of crossovers.

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