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Flashcards in Lecture 3 Deck (5)
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what happens in meiosis 1

crossing over and segregation
maternal and paternal homologs pair up
chromosomes pulled to separate poles


what happens in meiosis 2

chromatids pulled to separate poles


what complex facilitates homologous pairing of chromosomes

synaptonemal complex
it aligns the chromosomes ready for anaphase
allows for genetic recombination


how many crossings over are there in meiosis

at least one but never more than 4


what is aneuploidy

monosomy - 1 copy of chromosome
trisomy - 3 copies of chromosome
caused by non disjunction