Question

In a three-point cross, the double-crossover progeny can be identified because they

a. possess only mutant traits.
b. are homozygous for all three loci.
c. are the most numerous progeny.
d. are the least numerous progeny.
e. are the progeny with recessive phenotypes.

Answer 1

d. are the least numerous progeny. In a three-point cross, the double-crossover progeny can be identified because they are the least numerous progeny.

Step-by-step explanation:

In a three-point cross, the double-crossover progeny can be identified because they are the least numerous progeny. Double crossovers occur when two crossovers happen between the three loci being studied, resulting in a recombination of the original alleles. These double-crossover events are rarer compared to single crossovers, leading to a lower frequency of double-crossover progeny.