Meoisis Flashcards
(22 cards)
The process of division in sex cells, results in formation of gametes (which half the number of chromosomes) start 46 end 23
Meiosis
all of these determine traits and characistics 44 of the and pairs 1-22
autosomes
determine the sex of the offspring
sex chromosomes
sister chromosomes
homologous
on extra chromosome
trisomey
mom gives what chromosome
x
what chromosome does the dad give
x or y
cells that 2 sets of chorosomes
diploid
cells that have 1 set of chromosomes
haploid
phases of meiosis- sex cells
interphase prophase1 anaphase1 metaphase1 telophase1 cytokinesis prophase2 anaphase2 metaphase2 telophase2 cytokinesis
Once they are in 23 pairs- switch part of their DNA in Prophase 1
called crossing over
How is meiosis different from mitosis
in the first stages (interphase and prophase) chromosomes duplicate and also find their homologous pair
can cross over happen randomly on the chromotids?
Yes
does interphase happen in the second meiosis
No
during this stage both new cells divide again to form again to of fours cell
meiosis
body cells are always diploid: true or false
true
what are the two types of meiosis
female meiosis and male meiosis
when both stages of meiosis are complete there is only one ovum
female meiosis
when both stages of meiosis are complete there are form sperm cells )haploid)
male meiosis
the three eggs that dont survive meiosis
polar bodies
the failure of homologous chromosomes or sister chromotids to separate properly during cell division
nondisconjunction
the process of cell division of sex cells
meiosis
