IS THIS THE ONLY ANSWER FOR THIS QUESTION? PLEASE HELP 0.5 points Saved QUESTION

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IS THIS THE ONLY ANSWER FOR THIS QUESTION? PLEASE HELP

0.5 points Saved QUESTION 5 In maize, kernel color is affected by several genes, one of which leads to red (F/R, R/r) or white (r/r) color. If the genotype of an individual is R/t with an Ac element inserted into the R allele, what phenotypes could be seen? (There may be more than one correct answer white kernels Owhite kernels with red spots red kernels red kernels with white spots pink kernels Click Save and Submit to save and submit. Click Save All Answers to save all answers. SAVE ALL ANSWERS CLOSE WINDOW SAVE AND SUBMIT

Explanation / Answer

From the given question it is clear that the allele R is dominant, as it is expressed in a heterozygous condition. Now, according to the Ac-Ds system in maize, in the presence of an activator/transposase (Ac), the dissociator (Ds) can 'jump' and cause chromosomal breaks. This can happen in two ways:
a) the presence of the activator can cause the dissociator to transpose ( jump) to any other site on the chromosome, causing chromosomal breaks such that the dissociator and the downstream loci are lost. In this case, a white phenotype results ( from the only r allele on the other homologous chromosome).

b) the presence of the activator can cause the Ds element to transpose to a position within the R allele, disrupting its expression, such that a variegated phenotype results; in this case, white kernel with red spots.

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