3. Crossing Over Flashcards
1
Q
what is the point where chromosomes break?
A
chiasma
2
Q
define chiasma
A
the place where chromosomes break
3
Q
outline crossing over?
A
- chromosomes in each homologous pair twist around each other, the chromatids break and the sections rejoin
- attaches the chromatid on the opposite homologous chromosome
4
Q
define recombinant
A
recombinant are chromatids which have swapped sections with others
5
Q
crossing over leads to the exchange of _____
A
alleles (recombinant alleles)
6
Q
what phase does crossing over occur in?
A
meiosis I
prophase one
