Meiosis Flashcards
What is meiosis?
making gametes
What are gamets?
egg and sperm ( s*x cells)
What is asexual reproduction?
binary fission, budding, and regeneration are used by plants and animals to reproduce asexually through mitosis. Produces IDENTICAL copies of paretn cell.
- faster
- doesn’t need a partner
are …
advantages of asexual reproduction
- all ALIKE
- species can’t change and adopt
-one disease can wipe out a whole popultation
are…
disadvantages of asexual reproduction
What is sexual reproduction?
combines genetic material from 2 parents ( sperm and egg) so offspring are genetically different from paretn
- allows for variation in population
- allow species to adopt to canges in environment
are…
advantages of sexual reproduciton
What is another word for body cells?
somatic cells
Body cells ( somatic cells) have ____ copies of each chromosome= diploid ( 2n) ( one from mom and one from dad)
2 copies
All sperm and egg cells are
haploid(1n)
s*x cells have only ___ copy of each chromosome
one copy
- makes 2 cells genetically identical to parent cell and to each other
0 used by organisms to increase size of organism, repair inguries, repalce worn out cells
mitosis creates diploid body cells
- makes 4 cells genetically different from paretn cell and from each other
- used for sexual reproduction
meiosis creates haploid sex cell
What are the two steps Meiosis takes place in?
1) Meiosis I : IPMAT
2) PMAT
DNA replicates creating hmologous chromosomes
interphase I