If one set of chromosomes for a given plant is represented as N; in case of double fertilization, the zygote and the endosperm nucleus of a diploid plant would have how many sets of chromosomes respectively?
[amp_mcq option1=”N and 2N” option2=”2N and 2N” option3=”N and 3N” option4=”2N and 3N” correct=”option4″]
This question was previously asked in
UPSC NDA-2 – 2018
– One sperm cell fertilizes the egg to form the diploid zygote (embryo).
– The other sperm cell fertilizes the central cell of the embryo sac to form the primary endosperm nucleus.
– In most diploid angiosperms, the central cell contains two polar nuclei, both usually haploid (N). Their fusion with a haploid sperm (N) results in a triploid (3N) endosperm.