Explain why endosperm in angiosperms is triploid wle zygote formed is diploid.
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The process of fertilisation observed in
angiosperms is called as double fertilisation. It is the combination of
syngamy and triple fusion. Events during fertilisation are elucidated.
*As the pollen grain falls on the stigma of the flower, it germinates and forms a pollen tube. Pollen tube is guided by the secretions of the ovule. Pollen tube enters the micropylar region of the ovule.
*Embryo sac inside an ovule consists of antipodals, synergids, egg cell, a central cell with two polar nuclei.
*Pollen tube releases two male gametes into synergids cytoplasm. One of the male gametes fuses with the nucleus of egg cell by the process of syngamy to form diploid zygote(2n).
*The other male gamete fuses with the central cell and forms primary endosperm nucleus (PEN). This fusion is called as triple fusion. Hence, endosperm is triploid in nature.
*As the pollen grain falls on the stigma of the flower, it germinates and forms a pollen tube. Pollen tube is guided by the secretions of the ovule. Pollen tube enters the micropylar region of the ovule.
*Embryo sac inside an ovule consists of antipodals, synergids, egg cell, a central cell with two polar nuclei.
*Pollen tube releases two male gametes into synergids cytoplasm. One of the male gametes fuses with the nucleus of egg cell by the process of syngamy to form diploid zygote(2n).
*The other male gamete fuses with the central cell and forms primary endosperm nucleus (PEN). This fusion is called as triple fusion. Hence, endosperm is triploid in nature.
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Heya !!!
Here's your answer !!
Zygote is formed by the fusion of haploid female gamete and haploid male gamete....
Hence it's diploid in condition...
Endosperm is formed by fusion of diploid secondary nucleus of central cell and haploid male gamete....
Hence, it's triploid in condition....
Hope this helps you :)
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Here's your answer !!
Zygote is formed by the fusion of haploid female gamete and haploid male gamete....
Hence it's diploid in condition...
Endosperm is formed by fusion of diploid secondary nucleus of central cell and haploid male gamete....
Hence, it's triploid in condition....
Hope this helps you :)
Please mark as brainliest
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