Discuss how fertilized ovules develop into seeds. Geneticists working on the mod

Question

Discuss how fertilized ovules develop into seeds. Geneticists working on the model seed plant Arabidopsis thaliana impose a mutation causing pollen to contain a single sperm rather than two. Indicate whether the following statements are true or false regarding how this mutant pollen can affect the life cycle of A. thaliana. Seeds cannot provide a food source for a developing embryo. Pollination cannot occur. The pollen tube cannot form, preventing successful fertilization of the egg. A microspore from the mutant plant will still be able to develop into a male gametophyte. The sperm can fertilize the egg or fuse with an endosperm-producing cell, but not both.

Explanation / Answer

Seeds cannot provide a food source for a developing embryo ------> TRUE Pollination cannot occur ----------> FALSE The pollen tube cannot form, preventing successful fertilization of the egg --------> FALSE A microspore from the mutant plant will still be able to develop into a male gametophyte. -------------> TRUE The sperm can fertilize the egg or fuse with an endosperm-producing cell, but not both. ---------->TRUE

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