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(A) In angiosperms,the endosperm is formed by the process of double fertilization,specifically through the fusion of one male gamete with two polar nu

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Tetraploid

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(A) In angiosperms,the endosperm is formed by the process of double fertilization,specifically through the fusion of one male gamete with two polar nuclei (central cell).$1$. The female plant is diploid $(2n)$,so its polar nuclei will be haploid ($n$ each). The central cell,containing two polar nuclei,will have a ploidy of $n + n = 2n$.$2$. The male plant is tetraploid $(4n)$,so its gametes (produced by meiosis) will be diploid $(2n)$.$3$. During double fertilization,one male gamete $(2n)$ fuses with the central cell $(2n)$.$4$. The resulting endosperm ploidy is $2n + 2n = 4n$ (Tetraploid).

If a diploid female plant is crossed with a tetraploid male plant,what will be the ploidy of the endosperm?

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