CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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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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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: -Homologous chromosomes containing the two chromatids come together to form tetrads, joining at their centromeres (2n 4c). This is when “crossing over” occurs, which creates genetic variation.
Detailed explanation-3: -Every cell of the multicellular offspring has copies of the original two sets of homologous chromosomes. In prophase I of meiosis, the homologous chromosomes form the tetrads. In metaphase I, these pairs line up at the midway point between the two poles of the cell to form the metaphase plate.
Detailed explanation-4: -Many species have chromosomes that come in matched pairs. For example, the 46 chromosomes in a human cell can be organized into 23 pairs. These paired chromosomes are called homologous chromosomes. Homologous chromosomes are the same size and shape. Homologous chromosomes contain the same genes.