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In Some Fungi, Cell Division During Meiosis Gives Rise to an Ordered

Question 42

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In some fungi, cell division during meiosis gives rise to an ordered spore sac containing a row of four haploid spores, as shown in Figure 19-28A.The position of each spore within the sac reflects its relation to its neighbors; in other words, spores that result from the same meiosis II division are positioned next to each other.You notice that a strain of the fungus produced by crossing a dark-colored strain with a light-colored strain gives rise mostly to spore sacs as shown in Figure 19-28B, with a few spore sacs like those in Figure 19-28C.Indicate whether the following statements are CORRECT or INCORRECT.Explain your reasoning.
(A)
In some fungi, cell division during meiosis gives rise to an ordered spore sac containing a row of four haploid spores, as shown in Figure 19-28A.The position of each spore within the sac reflects its relation to its neighbors; in other words, spores that result from the same meiosis II division are positioned next to each other.You notice that a strain of the fungus produced by crossing a dark-colored strain with a light-colored strain gives rise mostly to spore sacs as shown in Figure 19-28B, with a few spore sacs like those in Figure 19-28C.Indicate whether the following statements are CORRECT or INCORRECT.Explain your reasoning.  (A)    (B)    (C)      Figure 19-28 A.Meiosis I and meiosis II in the fungus occur in the reverse order from that which occur in humans. B.Recombination in the fungus can occur during prophase I. C.Recombination in the fungus cannot occur during prophase II. D.The spore sacs in Figure 19-28C result from recombination between the centromere and the gene responsible for spore color. E.Recombination has occurred between the gene responsible for spore color and the end of the chromosome arm.

(B)
In some fungi, cell division during meiosis gives rise to an ordered spore sac containing a row of four haploid spores, as shown in Figure 19-28A.The position of each spore within the sac reflects its relation to its neighbors; in other words, spores that result from the same meiosis II division are positioned next to each other.You notice that a strain of the fungus produced by crossing a dark-colored strain with a light-colored strain gives rise mostly to spore sacs as shown in Figure 19-28B, with a few spore sacs like those in Figure 19-28C.Indicate whether the following statements are CORRECT or INCORRECT.Explain your reasoning.  (A)    (B)    (C)      Figure 19-28 A.Meiosis I and meiosis II in the fungus occur in the reverse order from that which occur in humans. B.Recombination in the fungus can occur during prophase I. C.Recombination in the fungus cannot occur during prophase II. D.The spore sacs in Figure 19-28C result from recombination between the centromere and the gene responsible for spore color. E.Recombination has occurred between the gene responsible for spore color and the end of the chromosome arm.

(C)
In some fungi, cell division during meiosis gives rise to an ordered spore sac containing a row of four haploid spores, as shown in Figure 19-28A.The position of each spore within the sac reflects its relation to its neighbors; in other words, spores that result from the same meiosis II division are positioned next to each other.You notice that a strain of the fungus produced by crossing a dark-colored strain with a light-colored strain gives rise mostly to spore sacs as shown in Figure 19-28B, with a few spore sacs like those in Figure 19-28C.Indicate whether the following statements are CORRECT or INCORRECT.Explain your reasoning.  (A)    (B)    (C)      Figure 19-28 A.Meiosis I and meiosis II in the fungus occur in the reverse order from that which occur in humans. B.Recombination in the fungus can occur during prophase I. C.Recombination in the fungus cannot occur during prophase II. D.The spore sacs in Figure 19-28C result from recombination between the centromere and the gene responsible for spore color. E.Recombination has occurred between the gene responsible for spore color and the end of the chromosome arm.


Figure 19-28
A.Meiosis I and meiosis II in the fungus occur in the reverse order from that which occur in humans.
B.Recombination in the fungus can occur during prophase I.
C.Recombination in the fungus cannot occur during prophase II.
D.The spore sacs in Figure 19-28C result from recombination between the centromere and the gene responsible for spore color.
E.Recombination has occurred between the gene responsible for spore color and the end of the chromosome arm.

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During normal meiosis, the chromosomes a...

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