Polyploid

Polyploid cells and organisms are those containing more than two paired (homologous) sets of chromosomes. Most species whose cells have nuclei (Eukaryotes) are diploid, meaning they have two sets of chromosomes—one set inherited from each parent. However, polyploidy is found in some organisms and is especially common in plants. In addition, polyploidy occurs in some tissues of animals that are otherwise diploid, such as human muscle tissues. This is known as endopolyploidy. Species whose cells do not have nuclei, that is, Prokaryotes, may be polyploid organisms, as seen in the large bacterium Epulopiscium fishelsoni . Hence ploidy is defined with respect to a cell. Most eukaryotes have diploid somatic cells, but produce haploid gametes (eggs and sperm) by meiosis. A monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Male bees and other Hymenoptera, for example, are monoploid. Unlike animals, plants and multicellular algae have life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis, the sporophyte generation is diploid and produces spores by meiosis.

Podcasts:

PLAYLIST TIME:

You Gotta Bleed

by: Crooked X

(V1)Fourth down, 50 to go
One more chance, one more hope
Hail Mary, right down the line
Gotta take my shot, now's my time
(V2)You know, when you're in the game
You're gonna have to feel some pain
Get it on, not give it out
That's what it's all about
(Pre)Well they might beat me
But it won't defeat me
(Ch)You gotta bleed sometimes
To get what you need sometimes
Sooner or Later, you're gonna see
You gotta bleed
(V3)I shoot tryin to score
If I miss, I try some more
Might be down, oh, but never out
In case you ever had a doubt
(V4)At the bottom lookin' down
What goes around, comes back on around
You gotta do, what you gotta do
To find a way to make it through
(Pre2)Well it might shake me
But it won't break me
(Ch2)You gotta bleed sometimes
To get what you need sometimes
Sooner or Later, you're gonna see
You gotta bleed
(Ch3)You gotta bleed sometimes
To get what you need sometimes
Sooner or Later you're gonna see
You gotta bleed
You gotta bleed
Sooner or Later, you're gonna see
You gotta bleed




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