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Ploidy - Wikipedia
The nucleus of a eukaryotic cell is haploid if it has a single set of chromosomes, each one not being part of a pair.By extension a cell may be called haploid if its nucleus is haploid, and an organism may be called haploid if its body cells (somatic cells) are haploid.
Haploid - Simple English Wikipedia, the free encyclopedia
Haploid is the term used when a cell has half the usual number of chromosomes.A normal eukaryotic organism is composed of diploid cells, one set of chromosomes from each parent. However, after meiosis, the number of chromosomes in gametes is halved. That is the haploid condition. In humans, the diploid number of chromosomes is 46 (2x23).The number in haploid cells (sperm and eggs) is 23.
Biology4Kids.com: Cell Structure: Chromosomes
Biology4Kids.com! This tutorial introduces chromosomes. Other sections include plants, animal systems, invertebrates, vertebrates, and microorganisms.
Doubled haploidy - Wikipedia
A doubled haploid (DH) is a genotype formed when haploid cells undergo chromosome doubling. Artificial production of doubled haploids is important in plant breeding.. Haploid cells are produced from pollen or egg cells or from other cells of the gametophyte, then by induced or spontaneous chromosome doubling, a doubled haploid cell is produced, which can be grown into a doubled haploid plant.
Meiosis — bozemanscience
Paul Andersen explains how the process of meiosis produces variable gametes. He starts with a brief discussion of haploid and diploid cells. He compares and contrasts spermatogenesis and oogenesis.
Haploidie – Wikipedia
Von Haploidie (altgriechisch ἁπλόος haplóos, ‚einfach‘) wird gesprochen, wenn das Genom (Erbgut) einer (Eukaryoten-)Zelle oder eines Prokaryoten (z. B. eines Bakteriums) nur einfach vorhanden ist, also jedes Allel in jeweils nur einer einzigen Ausprägung vorkommt.. Typischerweise sind die Chromosomensätze von Eizellen (Oocyten) und Spermien (Spermatozoen) haploid; die beiden ...
Biology Dictionary - D - Macroevolution.net - Biology ...
Biology Dictionary - D to DZO: Meanings of biology terminology and abbreviations starting with the letter D.
Genetic recombination) :: DNA from the Beginning
Animation in Concept 11: Genes get shuffled when chromosomes exchange pieces, DNA from the Beginning
Glossary of Terms: H - Physical Geography
Habitat Location where a plant or animal lives. Hadean Geologic eon that occurred from 3800 to 4600 million years ago. The Earth's oldest rocks date to the end of this time period. Hadley Cell Three-dimensional atmospheric circulation cell located at roughly 0 to 30° North and South of the equator.
Mendelian Genetics - Genetics Generation
The Mendelian Concept of a Gene In the 1860’s, an Austrian monk named Gregor Mendel introduced a new theory of inheritance based on his experimental work with pea plants. Prior to Mendel, most people believed inheritance was due to a blending of parental ‘essences’, much like how mixing blue and yellow paint will produce a […]
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