The central cell initially comprises two haploid polar nuclei, which, in many flowering plant species, fuse before fertilization, generating a diploid secondary nucleus (2). The diploid status of the central cell translates into triploid endosperm with a maternal/paternal ratio of 2:1.
Is central cell diploid?
Hence, the central cell is homodiploid (2n) in most angiosperms and polyploidy in some other species due to fusion of more than two nuclei, but remains haploid in some basal angiosperms such as Nymphaeales and Austrobaileyales (Figure 1B).
What is the ploidy of central cell?
Central cell is diploid in nature.
*Ploidy is the number of sets of chromosomes in a biological cell. Haploid number is the number of chromosomes in a gamete. Diploid number is made up of two complete haploid sets of homologous chromosomes.
Are Antipodals haploid?
Answer: (a) (i) Synergid? … diploid Since, all these cells three cells (synergid, polar nuclei and antipodals are) formed by mitosis from the functional megaspore, they are haploid (n). Egg cell fertilizes with the male gamete to form a diploid zygote.
Is central cell Binucleate?
Polygonum-type central cell is a binucleate cell that, upon fertilization with one of the two sperm cells, forms triploid endosperm to nourish embryo development. … The central cell plays a critical role in pollen tube guidance during pollination and in endosperm initiation after fertilization.
Is the central cell haploid or diploid?
Though the central cell is is having 2 polar nuclei . it is haploid as it is developed from megaspore ( n ) .
What is the ploidy of central cell in embryo sac?
Embryo sac carries two haploid nuclei and six haploid cells that do not have any cell walls. … As ploidy is a concept of genetics which refers to the number of chromosomes occurring inside the nucleus of a cell. So the ploidy of the embryo sac is haploid.
What is the central of a cell?
Definition. The most integral component of the cell is the nucleus (plural: nuclei). It is derived from a Latin word which means “kernel of a nut”. A nucleus is defined as a double-membraned eukaryotic cell organelle that contains the genetic material.
What is the ploidy of Antipodals?
DNA content in differentiated antipodal cells has been determined by a cytophotometric analysis; in the case of a mature embryo sac, the ploidy of antipodal cells varied from 8 to 32C.
Are Synergids haploid?
The synergid cells direct pollen tube growth to the female gametophyte. It makes possible the access of the tube into the embryo sac. Complete answer: … As these 8 nuclei are derived from the mitotic divisions of the haploid megaspore, these are haploid and thus, the synergids are haploid cells.