Why are the polychaete worms living near the underwater volcanic vent called Pompeii worms?

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.