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Gametes


Biology Gametes

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Gametes are haploid cells; that is, they contain one complete set of chromosomes (the actual number varies from species to species).
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Gametes are delicate single cells. For two plants to cross fertilize, there must be a mechanism for the two gametes to reach each other safely.
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gametes Haploid reproductive cells (ovum and sperm). PICTURE
gametophyte The haploid stage of a plant exhibiting alternation of generations, generates gametes by the process of mitosis.
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gametes Mature haploid cells (sperm and ova) that fuse to form a zygote.
gametic meiosis. Meiosis that occurs during formation of the gametes, as in humans and other metazoa.
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gametes: GR, gr X gr
If G and R are linked, then whenever you have a G, you have an R. Any gray, purple offspring (G-rr) would result from crossing over because a Gr gamete is needed.
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Gametes, reproductive cells, are haploid [n] and have one set of chromosomes. Sexually reproducing species have somatic cells, body cells, which are diploid [2n] having two sets of chromosomes, one from the mother and one from the father.
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Gametes or the cells that give rise to gametes.
germination
[L. germinare, to bud] ...
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gametes: sex cells of parent organisms; usually haploid cells.
gastrin: a hormone produced by digestive glands to influence digestive processes.
gene: the functional segment of chromosomes.
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gametes Reproductive cells (sperm or egg) which are haploid. gangliosides Sphingolipids containing complex oligosaccharides as head groups.
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gametes
Haploid egg or sperm cells that unite during sexual reproduction to produce a diploid zygote.
Covered in:
Lab 5 Sexual Reproduciton and Meiosis
Lab 14 Gametogenesis and Development ...
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union of gametes that are alike in their genetic content; contrast with heterozygote
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
What Topic Is Your BIOLOGY Paper On?
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having haploid gametes that are similar in size, structure and motility.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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The reduction division process by which haploid gametes and spores are formed, consisting of a single duplication of the genetic material followed by two mitotic divisions. Messenger RNA (mRNA).
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Artificial insemination -- the placement of sperm into a female reproductive tract or the mixing of male and female gametes by other than natural means. Autosome -- a nuclear chromosome other than the X- and Y-chromosomes.
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Asexual - a type of reproduction that does not require the union of female and male gametes
Biogenesis - the concept that all life arises from living matter
Cell - the smallest unit of life that carries out its own processes ...
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In vitro fertilization may take place with gametes from individuals other than the woman in whom the embryo may be implanted, or the male who is the prospective father. Whose authorization is necessary for collecting and analyzing DNA from the embryo?
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In a finite population (as all biological populations are) the gametes contributing to the next generation are a sample of the alleles in the gene pool.
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Germline: Tissues involved in the generation of haploid gametes.
Glycosylation: The covalent addition of sugar moities to N or O atoms present in the side chains of certain amino acids of certain proteins, ...
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In eucaryotes, recombination occurs during the formation of haploid gametes from diploid cells. Recombination frequency is used to construct genetic maps.
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This means that when somatic cells are produced from two gametes, one allele comes from the mother, one from the father. These alleles may be the same (true-breeding organisms, e.g. ww and rr in Fig. 3), or different (hybrids, e.g. wr in Fig. 3).
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Meiosis results in four rather than two daughter cells (gametes), each with a haploid set of each chromosome pair. In meiosis I the prophase is more complex than that of mitosis.
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Two successive nuclear divisions (with corresponding cell divisions) that produce haploid gametes (in animals) or haploid sexual spores (in plants and fungi) having one-half of the genetic material of the original cell.
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Epidemic spawning. Simultaneous shedding of gametes by a large number of individuals
Epipelagic zone. The 0- to 150-m-depth zone, seaward of the shelf-slope break
Epiphyte. Microalgal organism living on a surface (e.g., on a seaweed frond) ...
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: Fusion of female and male haploid gametes to form a diploid zygote from which a new individual develops.
Fingerprinting
: The use of
RFLPs
or repeat sequence DNA to establish a unique individual-specific pattern of DNA fragments.
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The number of chromosomes in most cells except the gametes. In humans, the diploid number is 46.
explained:
Listen to a detailed explanation.
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syngamy -- The process of union of two gametes; sometimes called fertilization. It encompasses both plasmogamy and karyogamy.
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heterogamy - state of having gametes of different sizes produced by different mating types or sexes.
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Meiosis
The process of nuclear division associated with the formation of gametes or of haploid cells from a diploid.
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[Gr. gamos - a marriage; Gr. genesis - origin, descent]. The formation of male and female sex cells or gametes (spermatozoa and ova, respectively) from germ cells.
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Gametophyte in plants and algae the 1n generation which produces gametes (eggs and sperm)
(gamet = marriage reproduction; phyto = plant) ...
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of years mutations and random genetic drift erode the Y chromosome, turning it into a genetic junkyard. In contrast, genes on the X are present in both males and females; X chromosomes, like autosomes, recombine in production of female gametes.
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