What is the advantage of a triploid endosperm?
The advantage of triploidy consists of the presence of a second set of maternal genes reducing transcription resource availability for paternal genes. This would lower the acquisitiveness of the endosperm.Jul 14, 2004
What is the purpose of triploid endosperm?
It is triploid (meaning three chromosome sets per nucleus) in most species, which may be auxin-driven. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. This can make endosperm a source of nutrition in animal diet.
Why do angiosperms have triploid endosperms?
Double fertilization is a distinctive feature of angiosperms. Each ovule receives a pollen tube that delivers two sperm cells to the embryo sac. One sperm fertilizes the egg cell, generating the diploid zygote, while the other sperm fertilizes the central cell giving rise to endosperm that is usually triploid.Aug 30, 2002
What is the role of triploid tissue?
Triploids can play an important role in polyploid evolution. However, their frequent sterility is an obstacle for the origin and establishment of neotetraploids.
What organism has a triploid endosperm?
In most flowering plants, the endosperm is triploid, and the ratio of female to male DNA is 2:1 within the endosperm.Apr 27, 2009
What is the function of the triploid endosperm in the embryo sac of an angiosperm?
The zygote now has a full complement of chromosomes (i.e., it is diploid), and the endosperm nucleus has three chromosomes (triploid). The endosperm nucleus divides mitotically to form the endosperm of the seed, which is a food-storage tissue utilized by the developing embryo and the subsequent germinating seed.
What is the function of the triploid endosperm in the embryo sac of an angiosperm quizlet?
The triple fusion of the sperm nucleus and 2 polar nuclei forms the triploid endosperm that provides food for the embryo.
What is the purpose of the triploid endosperm?
It is triploid (meaning three chromosome sets per nucleus) in most species, which may be auxin-driven. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. This can make endosperm a source of nutrition in animal diet.
What is the endosperm in angiosperm triploid?
Endosperm is a triploid tissue in angiosperms, because double fertilization results in the formation of a diploid zygote and a triploid endosperm. The female gametophyte or embryo sac has an egg nucleus and two polar nuclei. One sperm fertilizes the egg nucleus and forms the zygote, 2n.
What results in the formation of a triploid endosperm?
Endosperm is a triploid tissue in angiosperms, because double fertilization results in the formation of a diploid zygote and a triploid endosperm.
Which group produces a triploid endosperm within its seeds?
Endosperm is a triploid tissue in angiosperms, because double fertilization results in the formation of a diploid zygote and a triploid endosperm. The female gametophyte or embryo sac has an egg nucleus and two polar nuclei.