Search for crossword answers and clues
The nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants)
Answer for the clue "The nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants) ", 7 letters:
meiosis
Alternative clues for the word meiosis
Word definitions for meiosis in dictionaries
WordNet
Word definitions in WordNet
n. (genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants) [syn: miosis , reduction ...
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Meiosis \Mei*o"sis\ (m[-i]*[=o]"s[i^]s), n. [NL., fr. Gr. mei`wsis, fr. meioy^n to make smaller, from mei`wn. See Meionite .] (Rhet.) Diminution; a species of hyperbole, representing a thing as being less than it really is; understatement; see also litotes ...
Wiktionary
Word definitions in Wiktionary
n. 1 (context countable rhetoric English) A figure of speech whereby something is made to seem smaller or less important than it actually is. 2 (context uncountable cytology English) Cell division of a diploid cell into four haploid cells, which develop ...
Wikipedia
Word definitions in Wikipedia
Meiosis is a specialized type of cell division that reduces the chromosome number by half. This process occurs in all sexually reproducing single-celled and multicellular eukaryotes , including animals , plants , and fungi . Errors in meiosis resulting ...
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
"division of a cell nucleus," 1905, from Greek meiosis "a lessening," from meioun "to lessen," from meion "less," from PIE root *mei- (2) "small" (see minus ).\n \nEarlier (1580s) it was a rhetorical term, a figure of speech "weak or negative expression ...
Usage examples of meiosis.
Neighbouring cistrons on the same chromosome form a tightly-knit troupe of travelling companions who seldom fail to get on board the same vessel when meiosis time comes around.
The very first genes would have had to come from random DNA, since there were no genes or exons to be duplicated or crossed-over in meiosis.
Suppose it happened to bias meiosis in such a way that it, the mutant gene itself, was more likely than its allelic partner to end up in the egg.
But look- when we show meiosis reproduction, through the heterozygous population, see what happens.
Because all snail genes have an equal stake in every sperm and every egg, because they all participate in the same unpartisan meiosis, they work together for the common good, and therefore tend to make the snail body a coherent, purposeful vehicle.
The basic process is the same, meiosis and mitosis, governed by a molecular 'blue-print' not unlike our chromosomes.
I'm sure you recognized that 25-50-25 distribution as representing the most drastic case of inbreeding, one which can happen only half the time with line breeding, only a quarter of the time with full siblings, in both cases through chromosome reduction at meiosis.
Each primary spermatocyte gives rise by meiosis to two secondary spermatocytes, each of which in turn divides into two spermatids.