meiosis

Question 1

meiosis

Answer 1

the DNA replicates so there are 2 identical copies of each chromosome, called chromatids
DNA condenses to form a double armed chromosome made from 2 sister chromatid
the chromosomes arrage each other in homologous pairs
first division is the homologous pairs are splitted, halving the chromosome numbers
second the division the apirs of sister chromatid are seperated
2 new daughter cell that are genetically different are produced
which are called gametes

Question 2

2 ways that make gametes genetically different

Answer 2

crossing over
independent assortment

Question 3

crossing over

Answer 3

1)homologous pairs of chromosomes come together and pair up
2) 2 of the chromotds in each homologous pair twist around each other
the twisted bits are break off their original strand and rejoin onto the other chromatid, recombining their genetical material
3)chromatids have same genes but different combination of alleles

Question 4

independent assortment

Answer 4

4 daughter cells fromed from meiosis have completely different combination of chromosome
all your cells have a combination from your parents, half from your mum and half from your dad.
when gametes are produced, diff commbination of maternal and paternal chromosome go into each cell

Question 5

position of a gene

Answer 5

loci

Question 6

linked gene

Answer 6

the closer together the loci of 2 genes are the more close, more likely to be linked