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प्रश्न
Describe the formation of helobial endosperm
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उत्तर
Helobial type of endosperm:
a. It is an intermediate between nuclear and cellular type of endosperm.
b. First division of primary endosperm nucleus is followed by (division of cytoplasm) wall formation.
c. The wall formation results in the central cell being divided into a large micropylar and a small chalazal chamber.
d. In both the chambers the development occurs as seen in nuclear type.
e. This type is generally seen in Helobiae series of monocots, hence the name ‘Helobial Endosperm’.
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संबंधित प्रश्न
Endosperm of angiosperm is __________.
(A) haploid
(B) diploid
(C) triploid
(D) tetraploid
Identify the ploidy of embryo and endosperm respectively formed after following cross.
An angiospermic male plant with 24 chromosomes in its pollen mother cells is crossed with female plant bearing 24 chromosomes in its root cells.
At what stage of endosperm development, will you observe nuclear or cellular type of endosperm?
In dicots, the pollen grains are usually ______
If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be ______.
Double fertilization leading to initiation of endosperm in angiosperms require ______.
If the endosperm cell of an angiosperm contains 24 chromosomes, the number of chromosomes in the root tip cells will be ______.
Mark the odd one.
Coconut water contains:
The number of chromosomes in the leaf cells of a male plant is 40 and in the stem cells of a female plant is 60. If they are artificially hybridised, what will be the number of chromosomes in the endosperm?
