QUESTION 3 0.5 points Save Answor One form of male sterility (Ms) in corn is mat

Question

QUESTION 3 0.5 points Save Answor One form of male sterility (Ms) in corn is maternally transmitted. Plants of a male sterile line crossed with normal pollen give male-sterile plants. ln addition, some lines of com are known to carry a dominant nuclear restorer allele (Rf-that reres pollen fertility in male sterile lines. Another dominant restorer (Rf-2) has been found on a different chromosome. Either or both of the restorer allelos will restore pollen fertility in male sterile lines If a male-sterile plant is crossed with pollen from a plant heterozygous for Rf-1 and also for Rf-2, what is the phenotype of the F1? O fertile fermales; sterile males O fertile females; 3/4 fertile males; 1/4 sterile males fertile females; 1/4 fertile males; 34 sterile males O fertile females:; 1/2 fertile males; 1/2 sterile males O fertile fomales; fertile males

Explanation / Answer

rf/rf ( non restorer allele) Rf/Rf (restorer allele) Rf1...........is restorer dominant Rf-2.........is another restorer on different chromosome male sterile plants.....ms plant heterozygous for Rf-1 ........Rf1/+ plant heterozygous for Rf-2..........Rf2/+ when a male sterile plant "ms" crossed with pollen from Rf1/+ ; Rf2/+------------> 1/4 sterile males and 3/4 fertile males could be obtained.

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