PATHOLOGY MCQ
CELL DAMAGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When homologous chromosomes match up, they form a structure call a ____
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tetrad (pair of chromosomes, one from mom and one from dad)
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triad
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diploid
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quad (group of 4 replicated chromosomes, 2 from mom and 2 from dad)
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Explanation:
Detailed explanation-1: -During prophase I, the pairs of homologous chromosomes come together to form a tetrad or bivalent, which contains four chromatids. Recombination can occur between any two chromatids within this tetrad structure.
Detailed explanation-2: -Between prophase I and metaphase I, the pairs of homologous chromosome form tetrads. Within the tetrad, any pair of chromatid arms can overlap and fuse in a process called crossing-over or recombination. Recombination is a process that breaks, recombines and rejoins sections of DNA to produce new combinations of genes.
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