Define zygote in brief
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zygote, fertilized egg cell that results from the union of a female gamete(egg, or ovum) with a male gamete (sperm). In the embryonic development of humans and other animals, the zygote stage is brief and is followed by cleavage, when the single cell becomes subdivided into smaller cells.
The zygote represents the first stage in the development of a genetically unique organism. The zygote is endowed with genes from two parents, and thus it is diploid(carrying two sets of chromosomes). The joining of haploid gametes to produce a diploid zygote is a common feature in the sexualreproduction of all organisms exceptbacteria.
The zygote contains all the essential factors for development, but they exist solely as an encoded set of instructions localized in the genes of chromosomes. In fact, the genes of the new zygote are not activated to produce proteins until several cell divisions into cleavage. During cleavage the relatively enormous zygote directly subdivides into many smaller cells of conventional size through the process of mitosis(ordinary cell proliferation by division). These smaller cells, calledblastomeres, are suitable as early building units for the future organism.
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zygote, fertilized egg cell that results from the union of a female gamete(egg, or ovum) with a male gamete (sperm). In the embryonic development of humans and other animals, the zygote stage is brief and is followed by cleavage, when the single cell becomes subdivided into smaller cells.
The zygote represents the first stage in the development of a genetically unique organism. The zygote is endowed with genes from two parents, and thus it is diploid(carrying two sets of chromosomes). The joining of haploid gametes to produce a diploid zygote is a common feature in the sexualreproduction of all organisms exceptbacteria.
The zygote contains all the essential factors for development, but they exist solely as an encoded set of instructions localized in the genes of chromosomes. In fact, the genes of the new zygote are not activated to produce proteins until several cell divisions into cleavage. During cleavage the relatively enormous zygote directly subdivides into many smaller cells of conventional size through the process of mitosis(ordinary cell proliferation by division). These smaller cells, calledblastomeres, are suitable as early building units for the future organism.
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The cell formed by the union of a male sex cell (a sperm) and a female sex cell (an ovum) is called zygote.Also known as a fertilized ovum, the zygote begins as a single cell but divides rapidly in the days following fertilization.The zygote's genome is a combination of the DNA in each gamete, and contains all of the genetic information necessary to form a new individual.The zygote contains all of the genetic information (DNA) needed to become a baby.In humans, it takes about four days for a zygote to become a morula and another three days until the embryo attaches itself to the mother's uterine wall.The cells of the zygote divide repeatedly as the zygote moves down the fallopian tube. The zygote enters the uterus in 3 to 5 days.In the uterus, the cells continue to divide, becoming a hollow ball of cells called a blastocyst. If fertilization does not occur, the egg moves down the fallopian tube to the uterus, where it degenerates, and passes through the uterus with the next menstrual period.
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The cell formed by the union of a male sex cell (a sperm) and a female sex cell (an ovum) is called zygote.Also known as a fertilized ovum, the zygote begins as a single cell but divides rapidly in the days following fertilization.The zygote's genome is a combination of the DNA in each gamete, and contains all of the genetic information necessary to form a new individual.The zygote contains all of the genetic information (DNA) needed to become a baby.In humans, it takes about four days for a zygote to become a morula and another three days until the embryo attaches itself to the mother's uterine wall.The cells of the zygote divide repeatedly as the zygote moves down the fallopian tube. The zygote enters the uterus in 3 to 5 days.In the uterus, the cells continue to divide, becoming a hollow ball of cells called a blastocyst. If fertilization does not occur, the egg moves down the fallopian tube to the uterus, where it degenerates, and passes through the uterus with the next menstrual period.
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