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MEIOSIS is cell division that creates haploid GAMETES (egg cells and sperm cells). Each gamete contains HALF of the genetic material (DNA) required by the cell so that when fertilization occurs, the newly formed cell has a full set of DNA!
MEIOSIS is cell division that creates haploid GAMETES (egg cells and sperm cells). Each gamete contains HALF of the genetic material (DNA) required by the cell so that when fertilization occurs, the newly formed cell has a full set of DNA!
Meiosis ONLY happens in reproductive cells (egg and sperm).
Meiosis ONLY happens in reproductive cells (egg and sperm).
Just like Mitosis, it goes through the phases of PMAT to divide but Meiosis does PMAT twice!Â
Just like Mitosis, it goes through the phases of PMAT to divide but Meiosis does PMAT twice!Â
At the end of Meiosis the cell is split into 4 unique haploid gametes that all have HALF of the genetic material (DNA) needed.
At the end of Meiosis the cell is split into 4 unique haploid gametes that all have HALF of the genetic material (DNA) needed.
Big Takeaways for Meiosis:
Big Takeaways for Meiosis:
Meiosis:
Meiosis:
PMAT 2 times (meiosis I and meiosis II)
Crossing over occurs where homologous chromosomes (chromosomes containing the same types of genes) swap genetic material, making each combination of chromosomes unique.
Makes 4 UNIQUE daughter cells
Daughter cells each contain HALF of the chromosomes (Haploid)
Happens in REPRODUCTIVE CELLS ONLY
Why do egg and sperm cells only need half the number of necessary chromosomes???
Pause for VOCAB:
Gamete: egg or sperm cell
Diploid: Containing a full set of chromosomes, 46 in humans
Haploid: Containing half set of chromosomes, 23 in humans
Homologous Chromosomes: Two chromosomes that are similar in size and contain the same genes. Generally, one is from your mom and one from your dad. Homo = same
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