Q.

Arrange the types of chromosomes based on the length of the arms and centromere from the given characteristics respectively.
Terminal centromere, one long arm,
Extreme short arm, two equal arms.

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a

Metacentric, submetacentric, Telocentric, Acrocentric

b

Telocentric, submetacentric, Acrocentric, Metacentric.

c

Acrocentric, Metacentric, submetacentric, Telocentric

d

Telocentric, Metacentric, Acrocentric, Submetacentric

answer is B.

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Detailed Solution

Based on the position of the centromere, the chromosomes can be classified into four types.

 The metacentric chromosome has a middle centromere forming two equal arms of the chromosome. The sub-metacentric chromosome has a centromere slightly away from the middle of the chromosome, resulting in one shorter arm and one longer arm. In the case of the acrocentric chromosome, the centromere is situated close to its end, forming one extremely short and one very long arm, whereas the telocentric chromosome has a terminal centromere.

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