Meiosis 3.3

information from https://ib.bioninja.com.au/standard-level/topic-3-genetics/33-meiosis/

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Last updated: September 17, 2023

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First submitted	September 17, 2023
Times taken	11
Average score	30.0%
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Hint	Answer
the division of a cell into four genetically distinct haploid nuclei	meiosis
pairs of homologous chromosomes attached	bivalents
points where homologous chromosomes attach to each other	chiasmata
process in which genetic material is exchanges between non-sister chromatids in bivalents	crossing over
down syndrome	trisomy 21

Hint	Answer
nuclear membrane dissolves, chromosomes decondense, bivalents form, crossing over may occur	prophase 1
division by which sister chromatids are separated	meiosis 2
spindle fibres contract to pull apart homologous chromosomes	anaphase 1
chromosomes align randomly in metaphase 1, causes genetic variation	random orientation
chromosomes not separating	non-disjunction

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