Que: What is Parthenogenesis ?
1 Explain its types ?
A woman can give birth to male child
without fertilization &. How?
Answers
Explanation:
Parthenogenesis, a reproductive strategy that involves development of a female (rarely a male) gamete (sex cell) without fertilization. It occurs commonly among lower plants and invertebrate animals (particularly rotifers, aphids, ants, wasps, and bees) and rarely among higher vertebrates.
Parthenogenesis can occur without meiosis through mitotic oogenesis. This is called apomictic parthenogenesis. Mature egg cells are produced by mitotic divisions, and these cells directly develop into embryos. In flowering plants, cells of the gametophyte can undergo this process. The offspring produced by apomictic parthenogenesis are full clonesof their mother. Examples include aphids.
Parthenogenesis involving meiosis is more complicated. In some cases, the offspring are haploid (e.g., male ants). In other cases, collectively called automictic parthenogenesis, the ploidy is restored to diploidy by various means. This is because haploid individuals are not viable in most species. In automictic parthenogenesis, the offspring differ from one another and from their mother. They are called half clones of their mother.
virgin births in nature are common. The females of several large and complex animals, such as lizards and sharks, can reproduce without males, a process called parthenogenesis It’s a given that, at the very least, women need sperm if they are to conceive. But there’s no reason why that source of sperm ought to be a man. Ten years ago, Japanese researchers unveiled a mouse that had two mothers but no father. Named Kaguya, after a mythical moon princess born in a bamboo stalk, she was created in a laboratory by combining genetic material from two female mice.
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Answer:
parthenogenesis means giving birth to youngones without the involvement of partner
example bee