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Haploid in Biological Dictionary

Sporophyte

... and some algae, have life cycles in which a haploid gametophyte generation alternates with a ... phenomenon in which two distinct phases (a haploid and a diploid phase) occur in the life history ... (2n) sporophyte undergoes meiosis to produce haploid (1n) reproductive ... This sporophyte produces ...

Spermatid

... The term spermatid refers to the haploid male gametid that results from division of ... spermatocyte. spermatid n. Any of the four haploid cells formed by meiosis in a male organism ... Spermatid : Male germ cells derived from the haploid ... Information about spermatid in the free ...

Sex cells

... gamete ( ) n. A reproductive cell having the haploid number of chromosomes, ... A sex cell , ... of the sex -determining ... Gametes are haploid cells ; that is, they contain half(n) of a ... of homologous chromosomes, but we also contain haploid sex cells with one set and half the number. ...

Mictic egg

... ... mictic egg . A thin shell ed haploid egg . ... Larvae hatching out of these unfertilized mictic eggs develop into haploid males. ... Mictic eggs which will hatch into ... embryos known ... Mictic females lay haploid eggs that ... ( A) Mictic female with long ...

Meiosis

... that transforms one diploid cell into four haploid cells in eukaryotes in order to ... a diploid cell resegregate, producing four haploid daughter cells. ... Meiosis II separates the ... An overview of meiosis and an explanation of haploid versus diploid cells. A detailed look at ...

Megaspore

... cell divides by meiosis to produce four haploid ... mitotic divisions of the haploid megaspore are labeled. ... ... trends in ... mother cell in each ovule produces 4 haploid cells: ... MEGASPORE - a female spore; one ...

Haploid gametophyte

... diploid phase alternates with a multicellular haploid phase. The term can be confusing for people ... the multicellular structure, or phase, that is haploid , containing a single set of chromosomes: ... phase in a plant ... The alternation between haploid gametophyte and diploid sporophyte phases, ...

Haploid Cell

... parent), but sex cells (sperm and egg) are haploid . ... a diploid human cell contains 46 chromosomes: 2 complete haploid sets, or 23 ... In biology, meiosis is a ... in other organisms it can give rise ... haploid ( ) adj. Having the same number of sets of ...

Haploid

... are diploid, but sex cells (sperm and egg) are haploid . In contrast, tetraploidy is a type of polyploidy and is common in plants, and ... haploid ( ) adj. Having the same number of sets of ... as many as a somatic cell ... Sperms are haploid but when they are ... ploidy n. A multiple of ...

Gametes

... Gametogenesis is a process by which diploid or haploid precursor cells undergo cell division and differentiation to form mature haploid gametes . Depending on the biological life ... and more. ... Gametes are typically haploid (1N), containing only ... gametes ... ...

Gametogenesis

... is a process by which diploid or haploid precursor cells undergo cell division and differentiation to form mature haploid gametes. Depending on the biological life cycle ... ... Gametogenesis is the production of haploid sex cells (in humans, ovum and ... This is a ...

Gametophyte

... a pteridophyte in the form of a ... by forming a haploid gametophyte , there is only one allele ... ... contains a single complete set of ... between haploid gametophyte and diploid sporophyte ... ... in the alternation ... Firstly, by forming a haploid gametophyte , there is only one allele for ...

Gamete

... gamete ( ) n. A reproductive cell having the haploid number of chromosomes, especially a mature ... ... Gamete is a reproductive cell, normally haploid (one set of chromosomes), that ... These ... at Encyclopedia.com. ... gamete A specialized haploid cell (sometimes called a sex cell) whose ...

Diploid nuclei

... of diploid nuclei in a heterokaryotic, haploid mycelium ... Haploidization (not meiosis) ... of diploid nuclei in a heterokaryotic, haploid mycelium ... multiplication of the diploid along with haploid nuclei in the heterokaryotic ... The ...

Diploid Cell

... cells have 46 chromosomes and human haploid gametes ... The yeast Saccharomyces ... celled eukaryote with both a diploid and haploid mode of existence. The mating of yeast only ... cells with a number of chromosomes a two haploid b two diploid c four ... Human diploid ...

Polyploid

... polyploid (genetics; of a cell or organism) having more than twice the haploid number of chromosomes; 'a polyploid cell'; 'a polyploid MySpace ... Cells (and their owners) are polyploid if they contain more than two haploid (n) ... From 30% to 70% of today's angiosperms are thought to be ...

Genomic DNA

... thereby, a regular somatic cell contains two full sets of genomes. In haploid ... In molecular biology, a library is a collection of ... ... genome ( ) also genom n. The total genetic content contained in a haploid set of chromosomes in ... genomic DNA (full complement of DNA ) ...

Genome

... thereby, a regular somatic cell contains two full sets of genomes. In haploid ... The human genome is the genome of Homo sapiens, ... chromosome pairs, while the remaining pair is sex-determining. The haploid human genome occupies ... Learn why every living organism has a ...

Fertilization

... dividing rapidly into many cells. ... Fertilization is the fusion of haploid gametes, egg and sperm, to form ... HSTAT - In Vitro Fertilization As ... you ... The main function of fertilization is to combine the haploid sets of chromosomes ... In addition, fertilization activates the egg. ...

Diploid

... meiosis is the process that transforms one diploid cell into four haploid cells in eukaryotes in order to redistribute the diploid's cell's ... are frequently formed in this way. When a diploid gamete fuses with a haploid ... Diploid Cell ... Diploid Number. The number of chromosome ...

Daughter Cell

... produced from mitosis and meiosis differ? ... Isogamy: algal haploid daughter cells ... daughter cells definition ... Daughter Cell ... cells formed are identical to each other ... The end result is 4 haploid daughter cells that are not identical to one another. ... ...

Zygote

... and forms two embryos. ... zygotes , zygote ... zygote (zgt) ... zygote - (genetics) the diploid cell resulting from the union of a haploid ... ... zygote – Our zoology dictionary has ecology, physiology, genetics of zygote , and ... sin is the doctrine that every zygote ...

Zygospore

... A zygospore is a reproductive part of a fungus, a chlamydospore that is created by the nuclear fusion of haploid hyphae of different mating types. Definition of zygospore from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, ...

Telophase

... In telophase II the chromatids concentrate in the poles and the nuclear envelope ... The cells divide for the last time, leaving a total of four haploid cells, which ... Information about telophase in the free online English dictionary and ... In mitosis, telophase is preceded by anaphase. In ...

Sperm cells

... the size of ... A sperm , from the ancient Greek word σπέρμα (seed) and ζῷον (living being) and more commonly known as a sperm cell, is the haploid cell that is the male gamete. It joins an ovum to form a zygote. A zygote is a single cell, with a complete set of chromosomes, ... ...

Secondary oocyte

... Secondary oocyte information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues. This forms one haploid secondary oocyte and the first polar body. ... The secondary oocyte is the largest cell in the body, and in humans is just ... The ...

Regulatory sequence

... which is stored on 23 chromosome pairs. Twenty-two of these are autosomal chromosome pairs, while the remaining pair is sex-determining. The haploid human genome occupies ... The web resource Regulatory Sequence Analysis Tools (RSAT) is dedicated to the ... When the regulatory ...

Polar nuclei

... , generating a 3N triploid ... ... in the center containing two polar nuclei is called the endosperm mother cell. ... fuses with the two haploid polar nuclei (ABC and ABC) within the ... Encyclopedia article about exine. Information about exine in the Columbia ... and the other fuses ...

Ovum

... An ovum is a haploid female reproductive cell or gamete. Both animals and embryophytes have ova. The term ovule is used for the young ovum of an animal, as well ...

Ootid

... sperm but before the formation of a zygote ... number of the ootid and spermatid? How does ootid differ from a polar ... ootid ( ) n. A haploid cell that results from the meiotic division of an oocyte and ... number of the ootid and spermatid? How does ootid differ from a ... It ...

Oogenesis

... summaries, research information, and more. ... Oogenesis and sexual maturation in Meretrix ... In both spermatogenesis and oogenesis , a haploid nucleus is formed in ... During oogenesis , the primordial germ cell produces an oogonium with a diploid nucleus. ... mRNA localization ...

Nuclear genome

... nuclear genome is split into a set of linear DNA molecules, each con ... genome ( ) also genom n. The total genetic content contained in a haploid ... from their chloroplast and mitochondrial genomes to their nuclear chromosomes. ... ... Sequence Analysis of Plant Nuclear Genomes . ...

Nonvascular plants

... plants , like vertebrate amphibians, consequently tend to be ... Nonvascular plants spend the predominance of their life cycle in the haploid or ... The most primitive of the nonvascular plants are considered to be members of the ... The California Native Plant Society (CNPS) is a ...

Nondisjunction

... encyclopedia article on nondisjunction (genetics), Some cells have an abnormal number of chromosomes that is not a whole multiple of the haploid ... ...

Microgametophyte

... in plants having two types of ... A mature microspore that contains a microgametophyte ? ... microgametophyte IN BRIEF: n. - The male haploid multicellular individual or generation of a plant with alternation of generations produced by a tiny Microgametophyte population sizes and ...

Megasporocyte

... produce 4 ... Each ovule contains a megasporangium which produces one megasporocyte . The megasporocyte undergoes meiosis producing four haploid cells or megaspores. ... Lily Ovulary: Magasporocyte with 5x lens ... Explore Page Last 7 Days Interesting Calendar A ... megasporocyte . ....

Megasporangium

... ... L. The seed coat and megasporangium develop from tissues of the diploid sporophyte parent. ... M. Within the megasporangium is the haploid female gametophytic ... The megasporangium contains a megasporocyte which divides by meiosis to make four megaspores. ... is sitting ...

Mature ovum

... An ovum is a haploid female reproductive cell or gamete. Both animals and embryophytes have ova. The term ovule is used for the young ovum of an animal, as well ...

Mating type

... (the "female" signals the " ... The yeast Saccharomyces cerevisiae is a simple single celled eukaryote with both a diploid and haploid mode of existence. The mating of yeast only occurs between haploids, which can be either the a or α (alpha) mating type ... Mating type ...

Gonads

... is the organ that makes gametes. The gonads in males are the testes and the gonads in females are the ovaries. The product, gametes, are haploid germ cells. For example, spermatozoon and egg cells are gametes. Although medically the gonad term can refer to either male gonads (testicles) ...
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