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Question
The self-sterile gene S1 and S3 are present in
The self-sterile gene S1 and S3 are present in
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Solution
The correct option is A Pollen
If a plant carries S1 and S2 alleles, the pollen produced will carry either the S1 or S2 allele.When these pollen grains land on the stigma of the same flower, they will germinate and grow down into the style; however, their growth will be arrested in the upper one-third segment of the style. This is because the pistil recognizes S1 and S2 pollen as self-pollen through the matching of the S alleles.The tip of a self-pollen tube usually swells and bursts open.These self-pollen tubes are thus unable to deliver their sperm cells to the ovary for fertilization. So the correct option is 'Pollen'.
If a plant carries S1 and S2 alleles, the pollen produced will carry either the S1 or S2 allele.
When these pollen grains land on the stigma of the same flower, they will germinate and grow down into the style; however, their growth will be arrested in the upper one-third segment of the style. This is because the pistil recognizes S1 and S2 pollen as self-pollen through the matching of the S alleles.
The tip of a self-pollen tube usually swells and bursts open.
These self-pollen tubes are thus unable to deliver their sperm cells to the ovary for fertilization.
So the correct option is 'Pollen'.
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