When a diploid female plant is crossed with a | vedclass

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(D) In angiosperms,the endosperm is formed by the process of double fertilization,specifically through the fusion of one male gamete $(n)$ with two po

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Tetraploid

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(D) In angiosperms,the endosperm is formed by the process of double fertilization,specifically through the fusion of one male gamete $(n)$ with two polar nuclei $(n + n)$.$1$. The female plant is diploid $(2n)$,so its megaspore mother cell undergoes meiosis to produce haploid $(n)$ megaspores. The embryo sac formed is haploid $(n)$,and the two polar nuclei are each haploid $(n)$.$2$. The male plant is tetraploid $(4n)$,so its microspore mother cell undergoes meiosis to produce diploid $(2n)$ pollen grains. Therefore,the male gamete involved in fertilization is diploid $(2n)$.$3$. The endosperm is formed by the fusion of one male gamete $(2n)$ and two polar nuclei $(n + n)$.$4$. Thus,the ploidy of the endosperm = $2n + n + n = 4n$ (Tetraploid).

When a diploid female plant is crossed with a tetraploid male plant,the ploidy of the endosperm in the resulting seed will be:

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