| Each consists of an egg cell embedded in the tissue of the female gametophyte surrounded by a thick seed coat. |
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| Represented on our Punnet Square are the frequencies of each type of sperm and egg cell produced by all the males and females in the population. |
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| A single egg cell replicates itself, and the offspring cells in turn replicate themselves, and so on. |
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| Angiosperm seeds are comprised of an embryo and endosperm resulting from double fertilization of the egg cell and two polar nuclei, respectively. |
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| An egg cell is enucleated, that is, the nucleus is removed and replaced with the nucleus from the body cell of an animal of the same kind. |
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| Stripped of its own genetic instructions, the recipient egg cell is a tiny biological machine awaiting orders. |
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| At the micropylar end where the pollen tube delivers the two sperm cells, the egg cell is flanked by two synergids that assist in fertilization. |
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| If it does not implant, then that egg cell is released from the body during a woman's normal menstruation. |
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| Double fertilization of egg cell and central cell initiates development of the diploid embryo and the triploid endosperm, respectively. |
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| The sporogenous cells of the ovary lead to the production of the female gametophyte or embryo sac that contains the egg cell. |
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| Now, many hours later, the debate again concerns plans further to exploit women's bodies through the egg cell trade. |
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| In the male, progesterone increases the motility of the sperms and their ability to penetrate into the egg cell. |
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| The transfer of a diploid cell nucleus into an enucleated, unfertilised egg cell allows asexual replication even in mammals. |
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| A small hole is pierced in the follicle with a very fine and hollow needle in order to extract the egg cell. |
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| In particular, the large number of egg cell donations required for successful use of the technique must be regarded as unacceptable. |
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| Numerous antherozoids are produced in the antheridia and they swim through the covering film of water to reach the archegonia, each of which contains a single egg cell. |
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| In the caricatured version, preformationism has usually been ridiculed as the belief that a perfect homunculus lies within each sperm or egg cell. |
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| To create these strains of mice, scientists start at the beginning, with an egg cell. |
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| The egg cell would reprogram the skin cell nucleus back into its totipotent state. |
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| The second concerns the woman as egg cell donor and the risk of actually creating a market. |
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| For example, a fertilised human egg cell can only become a human being and nothing else. |
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| By the time of the menopause, the egg cell stock is exhausted and the woman is no longer able to conceive children. |
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| Cunniff, 26, deftly maneuvers one pipette to hold a round, plump egg cell in place. |
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| High levels of LH start the process of ovulation, when the follicle ruptures and the egg cell is released into the Fallopian tube. |
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| The next item on the agenda is the Commission's statement on planned egg cell trade. |
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| Human egg cell donation, however, is associated not only with medical risks but also with ethical problems. |
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| Changes in the mucus membrane of the womb make it more difficult for the fertilised egg cell to become embedded. |
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| This can result in neurohormonal dissociation, genetic disorders in the egg cell nuclei, pathological changes and complications with ovary function and structure, especially if the procedure is repeated several times. |
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| According to classical embryology, during normal development of a human, the stage of totipotency is limited to the fertilised egg cell and the daughter cells arising during the initial stages of division. |
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| I slip out of my egg cell after tearing through its skin. |
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| These remnants of ancient infections result from instances in which a retrovirus happened to slip inside a host's sperm or egg cell. |
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| The fly's second great gift to biology was essentially to crack the great mystery of how a many-celled complex animal develops from a single egg cell. |
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| He replaced the immature cell nucleus in an egg cell of a frog with the nucleus from a mature intestinal cell. |
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| Inside this heart-shaped box are five mini microbes a sperm cell, a egg cell, kissin disease, penici and an exclusi Amoeba. |
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| The female gametophyte corresponds to the embryo sac and covers an egg cell, a central cell, two synergid cells, and several antipodal cells. |
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| Parliament makes itself look foolish by tackling the subject of egg cell donations solely from the standpoint of the much-needed protection of women against involuntary exploitation. |
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| The ban that applied during the enquiry has been lifted and the organisation has meanwhile reported an increase in the applications for egg cell imports. |
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