Cell Cycle Flashcards
(8 cards)
Ploidy
Diploid- both maternal and paternal
Haploid- just one copy
Mitosis
Produce two cells with same chromosome number and content as the original
Each parent has 22 autosomal pairs of chromosomes and a pair of sex chromosomes xx or xy
Mitotic phases
Prophase
Metaphase
Anaphase
Telephase
Meiosis
Sequence of two cell divisions that results in the formation of four cells that have half the DNA of the parent cell
Restricted to the gametes
Crossing over
Occurs during first prophase
Meiosis II very similar to mitosis resulting cells are haploid
Results in daughter cells that are genetically different from the parent cell
Meiosis in males
Meiosis in females
Result in 4 spermatids
Results in 1 ovum and 3 polar bodies, cell divisions are unequal, the ovum gets the majority of cytoplasm
Pachytene
Crossing over event results in unique genetic combination
During meiosis I
Metaphase I
Maternal and paternal chromosomes align randomly so progeny have more of a contribution of maternal or paternal chromosomes