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
From Wikipedia, the free encyclopedia
Jump to: navigation, search ...
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 -- Having a single set of chromosomes in the nucleus of each cell. Mosses, and many protists and fungi, are haploid, as are some insects, bryophytes, and the gametes of all organisms. Contrast with diploid.
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 (meaning simple in Greek) cells bear one copy of each chromosome.
Haploid: A single set of chromosomes (half the full set of genetic material), present in the egg and sperm cells o f animals and in the egg and pollen cells of plants. Human beings have 23 chromosomes in their sex cells. Compare to diploid.
Haploid (HAP-loyd) Having a single set of chromosomes, as in egg or sperm cells. Haploid human cells have 23 chromosomes.
Haploid In the human case, having exactly one copy of each of the autosomes and one sex chromosome. (In the case of an organism with a non-chromosomal method of sex determination then having just one copy of the genome.) ...
Haploid cell. A cell containing only one set, or half the usual (diploid) number, of chromosomes.
haploid gametophyte
The part of the life cycle of plants having haploid nuclei and giving rise to the sex cells that on fusing produce a diploid stage, usually the sporophyte.
Covered in BIOL1020 Lab 6 Mitosis & Meiosis ...
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 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 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.
The haploid stage of a plant life cycle that produces gametes (by mitosis). It alternates with a diploid sporophyte generation.
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 ...
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.
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.
As stated supra note 1, each parent donates a haploid number of chromosomes to the offspring, giving it a diploid number. In donating a haploid number of chromosomes, each parent donates one allele to the offspring. See Brian R.
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.
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.
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.
Alternation of generations: An alternation of sexual (haploid) and asexual (diploid) form of generations in a life cycle (example: aphids).
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.
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.
[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.
The process of two consecutive cell divisions in the diploid progenitors of sex cells. Meiosis results in four rather than two daughter cells, each with a haploid set of chromosomes.
Source : Human Genome Project Information
Messenger RNA (mRNA) ...
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: Chromosome, Diploid, Cell, Organ, Chromosomes
|
