in a plant fruit color is either red or yellow and fruit sha

in a plant, fruit color is either red or yellow, and fruit shape is either oval or long. Red and oval are the dominant rait. two plants, both heterozygous for these traits, were testcrossed, with the result shown in the following table. Determine the location of the gene relative to one another and the genotype of the the two parental plant

phenotype plant A plantB

red, long 46 4

yellow, oval 44 6

red, oval 5 43

yellow, long 5 45

total 100 100

I have textbook solution but doesnt make sense can you explain it to me?

Solution

Oval=L; LL or Ll= Oval

Long=l; ll=long

Red=R; RR or Rr= Red

yellow=r; rr=yellow

When you said heterozygous,

So, it might be RO/ro   or Ro/rO

Progeny A: Ro/rO X rroo

Progeny B: RO/ro X rroo

Now estimate the recombination frequency for each plant

Plant A:

Recombinants are Red, long and yellow, oval

Recombination frequency = (number of recombinants)/Total progeny x100= (5+5)/100x100=10 m.u

Plant B:

Recombinants are Red, long and yellow, oval

Recombination frequency = (number of recombinants)/Total progeny x100= (6+4)/100x100=10 m.u

In Plant A, the two genes are located at a distance of 10 m.u from each other.

In Plant B, the two genes are located at a distance of 10 m.u from each other.