During ascus formation in Neurospora, any ascosporewith a chromosomal deletion dies and appears whitein color. How many of the eight ascospores in theascus would be white if the octad came from a crossof a wild-type strain with a strain of the oppositemating type carrying:a. a paracentric inversion, and no crossovers occurredbetween normal and inverted chromosomes?b. a pericentric inversion, and a single crossoveroccurred in the inversion loop?c. a paracentric inversion, and a single crossoveroccurred outside the inversion loop?d. a reciprocal translocation, and an adjacent-1segregation occurred with no crossovers betweentranslocated chromosomes?e. a reciprocal translocation, and alternate segregationoccurred with no crossovers between translocatedchromosomes?f. a reciprocal translocation, and alternate segregation occurred with one crossover between translocated chromosomes (but not between thetranslocation breakpoint and the centromereof any chromosome)?
During ascus formation in Neurospora, any ascospore
with a chromosomal deletion dies and appears white
in color. How many of the eight ascospores in the
ascus would be white if the octad came from a cross
of a wild-type strain with a strain of the opposite
mating type carrying:
a. a paracentric inversion, and no crossovers occurred
between normal and inverted chromosomes?
b. a pericentric inversion, and a single crossover
occurred in the inversion loop?
c. a paracentric inversion, and a single crossover
occurred outside the inversion loop?
d. a reciprocal translocation, and an adjacent-1
segregation occurred with no crossovers between
translocated chromosomes?
e. a reciprocal translocation, and alternate segregation
occurred with no crossovers between translocated
chromosomes?
f. a reciprocal translocation, and alternate segregation occurred with one crossover between translocated chromosomes (but not between the
translocation breakpoint and the centromere
of any chromosome)?
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