In a threepoint test cross the parental classes or maternall

In a three-point test cross, the parental classes (or maternally inherited heterozygous chromosomes) in the property have the following genotypes: a+, b+ c, and a, b, c+. The double recombinants are a+, b, c+ and a, b+, c. What is the gene order? a--b--c a--c--b b--a--c the gene order cannot be determined from this information.?

Solution

Answer:

c) b--a---c

Explanation:

b+ ----a+ -------c X b-----a-------c+

After double cross over, the double recombinants are b+-------a--------c and b-----a+ --------c+