Help 21. There are 2 stages of meiosis where non-disjunction may occur. They are
ID: 253060 • Letter: H
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21. There are 2 stages of meiosis where non-disjunction may occur. They are and a. Prophase I and anaphase I b. Anaphase I and prophase lI c. Prophase Il and anaphase lI d. Anaphase I and anaphase lI e. Prophase I and prophase lI 22. Griffith was a scientist who injected 4 separate groups of mice with deadly or friendly bacteria. The mice in group 1 were injected with living deadly bacteria and they died. The mice in group 2 were injected with living friendly bacteria and lived. Mice in group 3 were injected with heat-killed deadly bacteria and they also died. There was an unusual feature of the mice in group 4, however. What did Griffiths find in his group 4 mice? Those mice lived when they were injected with more friendly than deadly bacteria. Those mice lived because they were protected by early antibiotics. a. b. hose mice died when they should have lived since they were injected with living friendly bacteria and dead, deadly bacteria. Those mice died because they were poisoned by a toxin released by heat-killed deadly bacteria at their death. d.Explanation / Answer
Answer:
1) There are 2 stages of meiosis where non-disjunction may occur. They are Anaphase-I and Anaphase-II
Explanation: In Non-disjunction the chromsomes fail to separate from each other. Non disjunction can occur in Anaphase-I of Meiosis-I or Anaphase-II of Meiosis-II when sister chromatids fail to separate.
22) Griffith was a scientist who injected 4 separate groups of mice with deadly or friendly bacteria. The mice in group 1 were injected with living deadly bacteria and they died. The mice in group 2 were injected with living friendly bacteria and lived. Mice in group 3 were injected with heat-killed deadly bacteria and they also died. There was an unusual feature of the mice in group 4, however. What did Griffiths find in his group 4 mice?
Explanation: Griffith's experiment suggested that the underlying cause of pneumonia was not a toxin or poison released by the disease-causing bacteria.
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