Zygote

zygote
fertilized egg cell after fusion with male gamete, cell produced by the uniting of male and female sex cells
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
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Zygotene
[Gr. zygotos - yoked together; Gr. tainia - ribbon]. The second stage in prophase 1 of meiosis, characterized by the synapsis, or pairing, of homologous chromosomes to form a bivalent.
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A zygote (Greek: ζυγω"όν) is a cell that is the result of fertilization. That is, two haploid cells-usually (but not always) an ovum from a female and a sperm cell from a male-merge into a single diploid cell called the zygote (or zygocyte).
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Homozygote cells are diploid or polyploid and have the same alleles at a locus (position) on homologous chromosomes.
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A Chlamydomonas zygote that contains chloroplast DNA (cpDNA) from both parents, such cells generally are rare since normally cpDNA is inherited uniparentally from the mt+ mating type parent.
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zygote Diploid cell produced by the fusion of an egg and sperm; fertilized egg cell.
zygotic meiosis. Meiosis that takes place within the first few divisions after zygote formation; thus all stages in the life cycle other than the zygote are haploid.
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Zygote
Mostly diploid cell formed by union of twogametes or reproductive cells. Ovum (female gamete) fertilized by a sperm (male gamete).
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zygote
(zi-goat) [Gk. zygon,yolk, pair]
The diploid product of the union of haploid gametes in conception; a fertilized egg.
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zygote -- The product of gamete fusion. In organisms with a haploid life cycle, the zygote immediately undergoes meiosis, but in organisms with a multicellular diploid stage, ...
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Zygotes missing one chromosome ("monosomy") cannot develop to birth (except for females with a single X chromosome).
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Zygote A Developmental Biology Site
The Visible Embryo
Embryo Development Overview University of Pennsylvania Medical School.
Animated Embryogenesis Yale University, animated GIF images of Drosophila.
The Male Reproductive System Penn State...
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zygote - the diploid cell created by the union of two haploid gametes; a fertilized egg.
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Homozygote An organism that has two identical alleles of a gene.
See also: heterozygote
Homozygous See: homozygote
Human artificial chromosome (HAC) A vector used to hold large DNA fragments.
See also: chromosome, DNA ...
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Homozygote refers to an individual that has two identical genes. Example: AA or aa
A hybrid is a heterozygote. Example: Aa
Meiosis, Gamete Formation ...
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Homozygote. With respect to a given genetic locus, a diploid individual carrying two identical alleles
Hydrographic. Referring to the arrangement and movement of bodies of water, such as currents and water masses ...
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Homozygote an individual with a pair of two of the same allele
(homo = same like alike; zygo = yoke)
Homunculus a tiny preformed human which people thought merely increased in size to become a baby
(homunculus = little man dwarf) ...
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late zygotene . . . pachytene
diplotene
Axial elements begin to decorate chromosomal fibers.
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Heterozygote
A diploid or partially diploid organism with different alleles of one or more particular genes.
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Heterozygote advantage (or overdominant selection) is an example in which an allele selected against in the homozygous state is retained because of the superiority of heterozygotes.
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The human zygote is a totipotent cell. It basically can give rise to all the adult tissues, all the fetal tissues, and so forth. It seems that as the number of cells increases, the developmental potential becomes further and further restricted.
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Homozygote. An organism whose genotype is characterized by two identical alleles of a gene. See Allele, Genotype. Host. An organism that contains another organism. Human Genome Project.
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Dominant -- alleles that determine the phenotype displayed in a heterozygote with another (recessive) allele. Down syndrome -- a type of mental deficiency due to trisomy (three copies) of autosome 21, a translocation of 21 or mosaicism.
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One aspect of genetic drift is the random nature of transmitting alleles from one generation to the next given that only a fraction of all possible zygotes become mature adults.
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Mendel was also the first to hypothesize independent assortment, the distinction between dominant and recessive traits, the distinction between a heterozygote and homozygote, ...
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The situation in which a heterozygote shows the phenotypic effects of both alleles fully & equally, (eg blood group antigens).
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Definition: Haploid reproductive cells that unite during sexual reproduction to form a diploid zygote. Male gametes are sperm and female gametes are eggs.
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Sexual - reproduction involving the union of female and male gametes to form a zygote
Spontaneous generation - abiogenesis, the creation of life from nonliving material ...
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