Summary Meiosis Notes

Meiosis

·


Diploid
organisms
Chromosome number same in
every cell


No In (maternal Paternal
-



.
= +




Chromosomes found
·

in nuclei


-DNA wrapped around histones (protein (

Organises chromosomes into compact structures of chromatids
-




Chromosomes in_ Cell Division



Contain genetic information
·

most of our



Information carried to next
generation via chromosomes

Chromosome before
·


replicates cell division


Ensures each
daughter cell
gets fall complement of
genetic material




-Diploid and Haploid


Chromosomes of
·

made up 2 Sets

One paternal maternal
-



and one



This is diploid number (2n)
-




·

Gametes have one set

One chromosome from each
homologous pair

Haploid number (n)
-




Meiosis
·

occurs in ovaries and testes

Sperm
Spermatogenesis
-



=




Egg cells
-




=
oogenesis


DNA Replication-


Ensures has material
·

mother
each new cell same
genetic as cell


-Prevents loss of DNA




Homologous
·


Pair

Paternal maternal
-



+ chromosome

Same size and shape

Different alleles
-