Lecture 3 Flashcards Preview

BMS242 - Cell and Molecular > Lecture 3 > Flashcards

Flashcards in Lecture 3 Deck (5)
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1
Q

what happens in meiosis 1

A

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

2
Q

what happens in meiosis 2

A

chromatids pulled to separate poles

3
Q

what complex facilitates homologous pairing of chromosomes

A

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

4
Q

how many crossings over are there in meiosis

A

at least one but never more than 4

5
Q

what is aneuploidy

A

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