How To Use Sperm cell In A Sentence
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The team had already zeroed in on the Jhdm2a enzyme, showing in a 2007 Nature publication that the Jhdm2a gene is highly expressed in mouse testes and plays an important role in spermiogenesis, the final step in the production of a functional sperm cell.
Medlogs - Recent stories
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Expression was more obvious in aleurone cells, the endosperm cells lining the maternal seed coat.
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At the second stage, when the sperm cell reaches the vitelline envelope, other recognition molecules allow bindin of the correct species to attach the sperm tightly to the egg.
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Male sperm cells contain virtually no cytoplasm, and are thus lacking in mitochondria.
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It accumulates in the amyloplasta of the endosperm cells during grain filling.
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The seminiferous tubules in the testes, which are the origin of the sperm cells, however, will be reduced in diameter and size.
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When a person is carrying a mutation in an autosomal dominant gene, each egg or sperm cell has a 50 percent chance of containing the nonfunctioning gene copy and a 50 percent chance of containing the normal copy of the gene.
Genetics and Alagille Syndrome
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A sperm cell has no individual identity - a human being cannot develop from a sperm cell, and its genetic information can make a contribution to the identity of a person only in the presence of an egg cell.
Matthew Yglesias » Too Hot for CBS
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The most common male infertility factors include: azoospermia (no sperm cells are produced) and oligospermia (few sperm cells are produced).
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On one hand, angiosperm cells lack centrosomes as microtubule organizing centres and are missing the contractile ring which serves as a tool for cytokinesis in animal cells.
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After 5 weeks, oligospemia was observed, and after 10 weeks, testicular atrophy accompanied by the loss of sperm cells and spermatocytes was confirmed.
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It has been suggested that the small DNA amounts and low C-value variation are linked to the biflagellate nature of bryophyte sperm cells.
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The closer to ovulation you have intercourse, the better the chances to conceive a boy, because the male y-sperm cells are faster than the female x-sperm cells, and they tend to get to the egg first.
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At maturity, the antheridium bursts releasing the sperm cells or antherozoids.
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The sperm mass is called white roe, milt, or laitance, and is creamy rather than granular the sperm cells suspended in the proteinaceous fluid are microscopic.
On Food and Cooking, The Science and Lore of the Kitchen
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a sperm cell develops from a sperm mother cell
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In this sense, a human sperm cell is a potential adult human, and thus a potential person.
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When a subset of gonadal cells (egg or sperm cells) contains the same gene mutation, but the mutation is not found in any other cells of the body.
Alagille Syndrome Glossary
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Embryos that are trisomic contain, instead of matched pairs of chromosomes, one too many of a given chromosome, most commonly chromosome 13, 18, 21 (which is responsible for Down syndrome), X, or Y. Trisomies are the result of a glitch known as nondisjunction, which occurs principally during the creation of egg cells (although sperm cells may also exhibit such errors).
Delayed Childbearing
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It is a well-documented fact that guys will not ask for directions. This is a biological thing. This is why it takes several million sperm cells... to locate a female egg, despite the fact that the egg is, relative to them, the size of Wisconsin. Dave Barry
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It is a well-documented fact that guys will not ask for directions. This is a biological thing. This is why it takes several million sperm cells... to locate a female egg, despite the fact that the egg is, relative to them, the size of Wisconsin. Dave Barry
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The germinal vesicle now secretes a wall, divides into two parts, and while the rest of the embyro-sac fills with endosperm cells, it produces by cell division from the upper half a short row of cells termed a suspensor, and from the lower half a mass of cells constituting the embryo.
Scientific American Supplement, No. 531, March 6, 1886
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It is a well-documented fact that guys will not ask for directions. This is a biological thing. This is why it takes several million sperm cells... to locate a female egg, despite the fact that the egg is, relative to them, the size of Wisconsin. Dave Barry
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It is a well-documented fact that guys will not ask for directions. This is a biological thing. This is why it takes several million sperm cells... to locate a female egg, despite the fact that the egg is, relative to them, the size of Wisconsin. Dave Barry
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If endosperm cell division is halted at an early stage, kernels abort and fail to set seed.
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The large mass of endosperm cells stores food to nourish the early growth of the embryo or “germ.” fruit seed coats scutellum
On Food and Cooking, The Science and Lore of the Kitchen
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The findings of this study revealed for the first time in angiosperm cells that plasmolysis triggers an extensive reorganization of the AF cytoskeleton, which is involved in the regulation of protoplast shape and volume.
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It is a well-documented fact that guys will not ask for directions. This is a biological thing. This is why it takes several million sperm cells... to locate a female egg, despite the fact that the egg is, relative to them, the size of Wisconsin. Dave Barry
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It is a well-documented fact that guys will not ask for directions. This is a biological thing. This is why it takes several million sperm cells... to locate a female egg, despite the fact that the egg is, relative to them, the size of Wisconsin. Dave Barry
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When kinetin was applied to plants during early endosperm development, both endosperm cell number and endosperm/grain weight increased.
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The two sperm cells enter the ovule - in the ovule are a diploid cell called the polar nucleus and a haploid female gamete
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