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Question
The complex formed by a pair of synapsed chromosomes is called as
The complex formed by a pair of synapsed chromosomes is called as
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Solution
The correct option is B Bivalent
Meiosis occurs in two stages, meiosis I and meiosis II. Crossing over occurs during meiosis I. Homologous chromosomes pair during meiosis I, this is called as synapsis. The synapsis occurs between homologous chromosomes and facilitates crossing over. Each synapsed pair is comprised of two sister chromatids and hence is a bivalent. Each chromosome of a bivalent, in turn, is made up of two sister chromatids. Hence each pair is actually a tetrad of chromatids.So, the correct answer is option B.
Meiosis occurs in two stages, meiosis I and meiosis II. Crossing over occurs during meiosis I. Homologous chromosomes pair during meiosis I, this is called as synapsis. The synapsis occurs between homologous chromosomes and facilitates crossing over. Each synapsed pair is comprised of two sister chromatids and hence is a bivalent. Each chromosome of a bivalent, in turn, is made up of two sister chromatids. Hence each pair is actually a tetrad of chromatids.
So, the correct answer is option B.
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