Name 5 a The following arrangement of chromosomes was observ

Name: 5. (a) The following arrangement of chromosomes was observed in a plant cell undergoing division. Three loci and their alleles are marked. Assume that nothing aberrant is occurring. Ploidy. Reasoning (nij 12 PTsu State whether this configuration is consistent or not consistent with each of case the following possibilities, giving a one-line explanation in each metaphase I of meiosis metaphase II of meiosis

Solution

What is the ploidy in this cell and how did you reach your conclusion

Answer =Ploidy:1N (haploid)

Two different chromosomes are present

as because they don\'t have the same loci) and there is just one copy of each, so it must be haploid.

The fact that each chromosome has two chromatids (i.e., it\'s in a replicated state) does not change that conclusion.

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State whether this configuration is consistent or not consistent with each of the following possibilities, giving aone-line explanation in each case:

• metaphase I of meiosis

• metaphase II of meiosis

ANSWER : metaphase II of meiosis :Consistent –

assuming the original cell that began meiosis was diploid,

It can expect to see one replicated copy of each chromosome at metaphase II