The lettered circle in Figure 12.1 shows a diploid nucleus with four chromosomes
ID: 302081 • Letter: T
Question
The lettered circle in Figure 12.1 shows a diploid nucleus with four chromosomes. There are two pairs of homologous chromosomes, one long and the other short. One haploid set is symbolized as blak and the other haploid set is gray.
Can someone please explain this to me?
52 Answer: EB The lettered circle in Figure 12.1 shows a diploid nucleus with four chromosomes. There are two pairs of homologous chromosomes, one long and the other short. One haploid set is symbolized as black and the other haploid set is gray. The chromosomes in the unlettered circle have not yet replicated Choose the correct chromosomal conditions for the following stages. 52) What is the correct chromosomal condition at the prometaphase of mitosis? A) A ?) ? C) C D) D A.Explanation / Answer
Ans : B
Prometaphase: It is considered to be the second phase of mitosis after the prophase and prior to the metaphase. During this phase the nuclear envelope disappears so that nucleoplasm comes in contact with cytoplasm. A differenciation between two disappears. A fluid area occurs in the center of cell. Chromosomes can move freely in this area. Spindle apparatus or mitotic apparatus gets organised. Microtubules attach at kinetochores and the chromosomes begin moving.
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