Biology 1201A Midterm: Biology1201_Test2Outcomes_Week10
Document Summary
Describe the phases of meiosis and their associated key events and consequences. Metaphase i: the recombined tetrads are aligned on the equatorial plane via the movement of the spindle microtubules. Anaphase i: the two chromosomes are separated via spindle microtubules and each chromosomes is taken to the opposite spindle poles (there are now haploid number of chromosomes); each chromosomes still contains 2 sister chromatids at their centromeres. No dna replication between the first and second division) Predict and/or identify the phase in meiosis in which an error occurred based on the resulting daughter cells. Non-disjunction: one of the pairs or sister chromatids fails to separate this results in aneuploidy. The gamete could either have an extra chromosome or one less chromosome. If the gamete has one more, then after fertilization, that zygote could have trisomy (3 chromosome; if gamete has one less, then the zygote could have monosomy (1 chromosome)