Hi,
The answer is option b) PpFf
Given, one parent is a black, dull roller. So, the genotype should be ppff (Because P and F are dominant).
And also, if we look at the ratio of offspings, it shows all the combinations are almost in the same probability.
If we cross, PPFF and ppff (one recessive parent), all the offsprings will be of dominant character only. So, the above given permutations (ratio) are not possible with offspings. And also, crossing ppFF and ppff will not give the purple irridescense roller. So, the ratio of offsprins will not match. Similarly, if we cross PPff and ppff, we will not get iridisence roller. So, the option a, c, d are ruled out of answer.
Also, if we use a punnet square for option b) PpFf and ppff, we get all the combinations of offsprings in same ratio (1:1:1:1). So, the answer is b) PpFf.
explain as much as possible. Make sure to select only one answer for each of the...
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