what is the ploidy of endosperm course hero

by Tara Lueilwitz 4 min read

What is the ploidy of endosperm?

Endosperm is triploid (3n) in most of the angiospermic plant as two polar nuclei fuse with a male gamete and three of them are haploid.

What is the ploidy of angiosperm endosperm?

triploidThe ploidy level of endosperm in Angiosperms is triploid.May 22, 2021

What is the ploidy of endosperm in gymnosperms Class 11?

In gymnosperm, the ploidy of the endosperm is haploid.

Why is endosperm triploid?

Endosperm is formed during the double fertilization. It is triploid because it is formed when one of the two sperm that is haploid enters inside the embryo sac & fuses with two polar nuclei (each polar nuclei is haploid). So the endosperm formed is triploid.

What is ploidy of endosperm and embryo in angiosperms?

The correct option is C. 3n. Ploidy level of endosperm is generally triploid or 3n. During double fertilisation two of the haploid central nuclei in the embryo sac fuse to form diploid primary endosperm nucleus (PEN).

What is ploidy of endosperm and embryo in angiosperms Class 12?

Angiospermic endosperms are triploid in nature. In angiosperms, double fertilization occurs and as a result of that triple fusion takes place. The female gametophyte or embryo sac has an egg nucleus and two polar nuclei. One sperm fertilizes the egg nucleus and forms the diploid zygote.

What is the ploidy of zygote?

diploidThe zygote is formed by the fusion of male gamete(n) and female gamete (n) called syngamy, so it is diploid in nature, and primary endosperm nucleus is formed by the fusion of secondary diploid nucleus (2n) with one of the male gamete(n), so it is triploid in nature.

What is the ploidy of gymnosperm endosperm?

In gymnosperms the endosperm is haploid in nature. Whereas in angiosperms it is triploid, formed as a result of double fertilization.

What is the ploidy of embryo?

The ploidy of embryo sac is Haploid. The number of set of chromosomes is called as Ploidy.

How does angiosperms endosperm become triploid?

This diploid nucleus of central cell fuses with one of the two male gametes . The two polar nuclei and one male gamete fuses to form a triploid primary endosperm nucleus (3n). Thus, the endosperm is formed this triploid nucleus and becomes triploid.Nov 26, 2019

Are all angiosperms triploid?

Most angiosperms have a Polygonum-type embryo sac with two polar nuclei and produce a triploid (3n) endosperm as in Arabidopsis. In a few species, more than two polar nuclei are present in the central cell leading to the formation of endosperm with a ploidy higher than 3n [3].Aug 30, 2002

What is the ploidy of the endosperm resulting from double fertilization?

This type of gametophyte is referred to as “Oenothera.” After double fertilization (which adds one paternal contribution, 1p), the central cell becomes a diploid endosperm (1m:1p). This endosperm is genetically identical to the embryo.