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Haploid

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haploid
Referring to an organism or cell having only one member of each pair of homologous chromosomes and hence only one copy (allele) of each gene or genetic locus. Gametes and bacterial cells are haploid. See also diploid.


haploid
the chromosome set with only one member of each chromosome pair
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...

For instance, a human germ cell (a sperm or an egg cell) is haploid, which means it contains only one of each of the 23 chromosomes of the human genome, or it only has half the diploid (2n) number of a human somatic cell (which is 46).

Haploid
Haploid is the quality of a cell or organism having a single set of chromosomes. Organisms that reproduce asexually are haploid. Sexually reproducing organisms are diploid (having two sets of chromosomes, one from each parent).

Doubled haploidy
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Haploid, Diploid
Diploid cells (2N) have two complete sets of chromosomes. The body cells of animals are diploid.
Haploid cells have one complete set of chromosomes. In animals, gametes (sperm and eggs) are haploid.

haploid Cells that contain only one member of each homologous pair of chromosomes (haploid number = n). At fertilization, two haploid gametes fuse to form a single cell with a diploid number of chromosomes.

Haploid
Only one copy of each chromosome per cell. (Prokaryotes are haploid, although more than one copy of a chromosome may be transiently present in the cell, depending on the rate of DNA replication and the growth rate.) ...

haploid cell
(hap-loyd) [Gk. haploos, single + ploion, vessel]
A cell containing only one set of chromosomes (n).
Hardy-Weinberg equilibrium ...

haploid /HAP-loid/ adj. (1) in the case of a single-celled eukaryotic organism, having a single complete set of chromosomes; (2) in the case of a multicellular eukaryotic organism, having a single complete set of chromosomes in each somatic cell.

Haploid (meaning simple in Greek) cells bear one copy of each chromosome.

Haploid: A single set of chromosomes (half the full set of genetic material) as in the egg and sperm (germ)cells of animal ...

haploid cells containing one copy of each chromosome.
hemoglobin a red pigment that binds oxygen and carbon dioxide molecules and carries them through the bloodstream.
herbivores animals that eat plants.

Haploid cell. A cell containing only one set, or half the usual (diploid) number, of chromosomes.

haploid: The number of chromosomes in a sperm or egg cell, half the diploid number. NHGRI ...

Haploid having one set of chromosomes
(haplo = half; ploid = a set of chromosomes)
Hematoma local swelling‚ tumor‚ or bruise filled with blood
(hemo = blood; -oma = tumor) ...

Haploid number (n): The number of chromosomes in the gamete after meiosis. In humans, the haploid number is 23.

Haploid - Having only one set of chromosomes.
Jacket Cell - A component of the cell layer that covers the reproductive organs of plants and prevents them from drying out.

Haploid and diploid are terms referring to the number of sets of chromosomes in a cell. Gregor Mendel determined his peas had two sets of alleles, one from each parent. Diploid organisms are those with two (di) sets.

Haploid - gametophyte, produces gametes (then syngamy)
Diploid - sporophyte, produces spores (meiosis)
Primitively, the haploid state is the dominant stage
the diploid is only briefly seen ...

Haploid cells can live indefinitely in the haploid condition. However, if two cells of opposite mating types meet, they can fuse and enter the diploid phase of the cell cycle.
This is not as rare event as you might expect.

Haploid (n)-- one set chromosomes
Diploid (2n)-- two sets chromosomes
Most plant and animal adults are diploid (2n)
Eggs and sperm are haploid (n) ...

haploid The reduced, or N, number of chromosomes, typical of gametes, as opposed to the diploid, or 2N, number found in somatic cells. In certain groups, mature organisms may have a haploid number of chromosomes.

Haploid a term referring to cells which contain only a single copy of each chromosome.
Hardy-weinberg principle states that the proportion of dominant and recessive alleles of a particular gene remains the same if certain conditions are met.

The haploid stage of a plant life cycle that produces gametes (by mitosis). It alternates with a diploid sporophyte generation.

The haploid (1N) products of meiosis are known as gametes.
During meiosis, homologous chromosomes align with one another in a process known as synapsis.

The haploid nuclei of the sperm and ovum fuse in fertilization.
The ruptured follicle develops into the corpus luteum.
If the released oocyte is not fertilized, the corpus luteum degenerates.

A. 2 haploid daughter cells
B. 4 diploid daughter cells
C. 2 diploid daughter cells
D. 4 haploid daughter cells - CORRECT!! ...

Gametophyte. Haploid stage in the life cycle of a plant
Generation time. The time period from birth to average age of reproduction
Genetic drift. Changes in allele frequencies that can be ascribed to random effects ...

Meiosis produces haploid cells, which contain just one member of every chromosome pair characteristic of an organism.

Plants exhibit life cycles that involve alternating generations of diploid forms, which contain paired chromosome sets in their cell nuclei, and haploid forms, which only possess a single set.

During the growth and extension of the tube, the generative nucleus, behind the tube nucleus, divides by mitosis to produce 2 male haploid gametes. The pollen tube enters the ovule through the micropyle and penetrates the embryo sac wall.

Gametes are haploid cells that carry reproductive functions produced through meiosis. Gametes carried by males are called sperms and gametes carried by females are called eggs.

The four haploid cells formed at the end of meiosis. The term was formerly used for the four chromatids making up a chromosome-pair at the first division of meiosis.
Related Terms:
Haploid ...

pronucleus - haploid, gametic nucleus (from sperm or egg) in a fertilized egg, prior to fusion to form a zygote nucleus ...

See Haploid cell. Directional cloning. DNA insert and vector molecules are digested with two different restriction enzymes to create noncomplementary sticky ends at either end of each restriction fragment.

not an exact multiple of the haploid number. For example, Downs syndrome (three #21 chromosomes) or Klinefelter syndrome (XXY males). AnticodonA sequence of three bases in tRNA that is complementary to a codon in mRNA.

Gametes are haploid (one copy of each autosome) (figure 1). Normal hepatocytes are tetraploid.

Gamete -- an haploid cell.gel electrophoresis the process by which nucleic acids (DNA or RNA) or proteins are separated by size according to movement of the charged molecules in an electrical field.

The purpose of meiosis is to produce haploid (1n) gametes. Another purpose is to recombine genes from the parents of the individual in whom meiosis is occurring.

We [began to work] with yeast cells because they were susceptible to genetics; because they would grow as haploid cells. We couldn't do the same kind of genetics with human cells. We were looking for the things in common between yeast and human cells.

In yeast (S. cerevisiae), which has a haploid genome size of 13 megabases, the primary insulator function of TFIIIC seems to be the demarcation of chromatin into distinct domains for blockage of heterochromatin silencing. In A.

For example, for a haploid number of n, 2n is the number of possible outcomes. Humans have a haploid number of 23. 223 gives a value of over 8 million.

Alternation of generations: An alternation of sexual (haploid) and asexual (diploid) form of generations in a life cycle (example: aphids).

Fungal mycelia are typically haploid. When mycelia of different mating types meet, they produce two multinucleate ball-shaped cells, which form a mating bridge.

Cells with only one set (23 in a human) are called haploid cells. Haploids are most often found in cells involved in sexual reproduction such as a sperm or an egg. Haploid cells are created in cell division termed meiosis.

GROWTH of daughter cells from mitotic divisions
Products of the growth phase divide by MEIOSIS producing haploid cells (46→23)
MATURATION of haploid daughter cells into gametes (eggs, sperm)
Heads are embedded in Sertoil cells ...

Gamete: A mature male or female germ cell possessing a haploid chromosome set and capable of fusing with a gamete of the opposite sex to produce a fertilized egg.
More Biology Terms ...

Meiotic product An individual haploid genome within an egg or sperm cell. Meiotic products are usually observed and analyzed within the context of diploid offspring.

Ploidy: the number of complete sets of chromosomes in each cell in an organism. The ploidy series is haploid (1 copy), diploid (2 copies), triploid (3 copies), tetraploid (4 copies), pentaploid (5 copies), hexaploid (6 copies) etc.

pronucleus [Gr. pro- - a prefix meaning before, in front of; L. nux - nut]. The haploid, or reduced, nucleus of a gamete (ie. sperm and egg). The reduced nuclei of the sperm and egg join together in the fertilized ovum to form the zygote.

Telophase I: CLEAVAGE FURROW forms beginning the process of CYTOKINESIS (cell division). Resulting daughter cells are HAPLOID (1N).
Prophase II: Spindle formation begins and centrosomes begin moving toward poles.

aneuploid
A chromosomal condition resulting from either an excess or deficit of a chromosome or chromosomes so that the chromosome number is not an exact multiple of the typical haploid set in the species.

in which a single cell produces four daughter cells each of which contains half of the number of chromosomes of the parent cell. For example, a single diploid spermatogonium (primordial germ cell) will divide meiotically to produce 4 haploid sperm ...

However, those that do not are simply more like haploid organisms, such as bacteria, than they are like diploid organisms, such as human beings.

See also: See also: Diploid, Chromosome, Organ, Cell, Cells

Biology  Halobacteria  Haploid Cell

 
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