why is an endosperm triploid
In the life cycle comparison, the only cells that are triploid are in the endosperm of a seed plant. Endosperm is formed by the fusion of a haploid sperm (n) with two haploid polar nuclei (n + n) resulting in triplolid endosperm cells (n + n + n = 3n). triploid endosperm cell inside a seed must contain 36 chromosomes (3 x 12 = 36). Questions 126 - 129: The genotype for a polyploid plant cell is AAaaBBbbCCccDDdd. Since there are four haploid sets consisting of one of each letter, this cell must be tetraploid or 4n: ABCD + ABCD + abcd + abcd = AAaaBBbbCCccDDdd.