Outline the major differences between mitosis and meiosis I. What will be an ideal response?
Concepts to Consider: During prophase of meiosis I, there is crossing over between
homologous chromosomes, which does not take place during mitosis. In addition, during
meiosis I, tetrads composed of homologous chromosomes line up on the metaphase plate
rather than sister chromatids, as happens in mitosis. It is the homologous chromosomes that
separate during anaphase of meiosis I rather than sister chromatids (as happens during
mitosis).
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Which type of tissue produces a matrix that surrounds and supports cells?
a. epithelial b. connective c. muscle d. nerve e. endocrine
Eukaryotic mRNA has a significantly longer half life than its prokaryotic counterpart. How is this
accomplished in eukaryotes? What processes tend to degrade mRNA molecules in both eukaryotes and prokaryotes, and why are these processes needed? What will be an ideal response?
The advantage of homologous recombination is that ________.
A. following a splice with Cas9, the ends are joined back together with the induction of a frameshift mutation resulting in an inactive protein B. following a splice with a restriction enzyme, the sticky ends can be combined with a piece of donor DNA that has the same sticky ends C. genes from two different sources can be joined together when the wild-types contain homology between the two molecules, allowing DNA ligase to join the naturally-occurring sticky ends D. following a splice with Cas9, the ends of the chromosome can be seamlessly joined with a piece of donor DNA that has been engineering to contain flanking sequences homologous to the broken chromosome ends
Meroblastic cleavage occurs in _____
A) sea urchins, but not in humans or birds B) humans, but not in sea urchins or birds C) birds, but not in sea urchins or humans D) both sea urchins and birds, but not in humans