BC3 and DEF4 are two loci in yeast. When ABC3 def4 haploid yeast were mated to abc3 DEF4 haploid yeast, the resulting diploid sporulated, and the tetrads analyzed, it was found that the number of nonparental ditype tetrads and the number of parental ditype tetrads were both about 25%, About 50% of the tetrads were tetratypes. Which is true?
Group of answer choices
ABC3 and DEF4 are each far from the centromere of the chromosome that is on. It is impossible to tell if they are on the same chromosome.
ABC3 and DEF4 are unlinked, and either ABC3 or DEF4, or both, but not necessarily both, are far from the centromere of the chromosome they are on.
ABC3 and DEF4 are unlinked, and both ABC3 and DEF4 are close to the centromere of the chromosome that they are on.
ABC3 and DEF4 are unlinked, and both ABC3 and DEF4 are far from the centromere of the chromosome they are on.