Sexual reproduction in flowering plants: Pollination, fertilization

Plant life cycle and alternation of generations

When it comes to plants, there are two different mechanisms of reproduction. Each generation is referred to as a generation. Between these generations, there is a cycle of rotation. Consequently, one full life cycle of a plant is comprised of two generations that alternate with one another. As a result, the entire mechanism is referred […]

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization

Xenogamy

Introduction Xenogamy word refers to the transfer of pollen grains from the anther of one plant to the stigma of a different plant. This is one and the only type of cross-pollination that during pollination brings about genetically different types of pollen grains to the stigma. The term xenogamy (along with geitonogamy and autogamy) was

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization

Types of Pollination

Do you ever wonder why are the flowers so brightly coloured? What attracts bees to them? Flowers aid in the reproduction of plants. The transmission of pollen grains from a flower’s male anther to its female stigma is known as pollination. What is pollination?  Pollination is the process of pollen grains being transferred from stamens, the

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization

Types of Parthenocarpy

Introduction The ability to develop fruits without pollination is referred to as parthenocarpy (apomixis excluded). According to Pike and Peterson108, this trait is controlled by the Pc gene, which is only partially dominant. De Ponti and Garretsen114 proposed that parthenocarpy is inherited through three independent, isomeric major genes with additive action, as well as a

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization

Types of honeybees

Like all other living beings, honeybees have different temperaments, disease resistance, and productivity levels. The environment significantly influences bee colony variances (for example, plants in other places produce various honey crops). Still, a colony’s genetic composition can also affect the features that characterise a group. Beekeepers have long recognised that different genetic stocks have distinct

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization

Types and Breeding of Animals

Breeding is the application of genetic concepts to promote desirable attributes in animal husbandry, horticulture, and agriculture. Several plants were improved by ancient agriculturists through selective cultivation.  Modern plant breeding centres recommend that only pollen from the chosen male parent be carried on to the chosen female parent. Animal breeding entails determining the appropriate attribute

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization

Triple fusion

Introduction It is a mechanism that occurs during angiosperm sexual reproduction.  Triple fusion occurs when a sperm nucleus and two polar nuclei fuse during double fertilisation in a seed-bearing plant, resulting in the development of endosperm. The angiosperm embryo sac is where the fusing takes place.  When the stigma comes into contact with pollen grains

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization

Triple Fertilization

Triple fusion is described as fusion that occurs between two polar nuclei and the sperm nucleus in one cell. A triploid nucleus known as the Primary Endosperm Nucleus is formed during double fertilisation in a seed plant, and it is responsible for the development of the seed (PEN). The PEN will eventually develop into an

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization

The Post-Fertilization Events

In plants, fertilisation is the union of the male and female gametes to form a zygote. In flowering plants, double fertilisation occurs when the two male nuclei in the pollen grain fuse with the egg and the polar nuclei to form the diploid zygote and triploid endosperm. Definition of Post-Fertilization Post fertilisation is defined as

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization

Sporophyte and gametophyte

Sporophyte: The spore-producing phase of a plant’s life cycle is known as sporophyte. Plants reproduce in two stages: sexual and asexual reproduction. The alternation of generation separates these two phases into the sporophyte and gametophyte through the processes of meiosis and fertilisation. To better comprehend the plant’s life cycle, sporophyte refers to the stage in

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Biology, Class 12, NEET, Reproduction, Sexual reproduction in flowering plants: Pollination, fertilization