Answer to Question #60821 in Genetics for Sanjukta Ghosh

Question #60821

When the dihybrid test cross ratio comes out to be 1:1:1:1 it means that the genes are not linked and they assort independently. But from there could we say that the genes are not present on same chromosomes?

I'm thinking this because the genes present on a chromosome form a linkage group that means they are linked.So could we say that the genes involved are not present on the same chromosomes but on different chromosomes?

Expert's answer

True. The genes involved are not present on the same chromosomes but on different chromosomes.
The genes present on same chromosome, will not assort (separated) independently.