EMBRYOLOGY
CHROMOSOMES AND CELL DIVISIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cell
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chromosome
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Either A or B
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None of the above
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Detailed explanation-1: -So, a cell is the largest of the five entities. Their genetic material is called DNA and is a macromolecule found inside an organelle called the nucleus. The DNA is very large and complex, so the cell tends to organize it into chunks named chromosomes.
Detailed explanation-2: -Chromosome 21 is the smallest human chromosome, spanning about 48 million base pairs (the building blocks of DNA) and representing 1.5 to 2 percent of the total DNA in cells.
Detailed explanation-3: -From the above explanation it is clear that the series of organisation of genetic material from largest to smallest is Genome, Chromosome, Gene, Nucleotide which is given in the option D.
Detailed explanation-4: -Chromosomes are structures within cells that contain a person’s genes. Genes are contained in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes.