HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a reduced number of genes in cell nuclei
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fewer cell mutations than a person with a normal chromosome number
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more genes in each cell than a person with a normal chromosome number
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less DNA in cell nuclei, but more proteins in cell mitochondria
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Detailed explanation-1: -A medical term for having an extra copy of a chromosome is ‘trisomy. ‘ Down syndrome is also referred to as Trisomy 21. This extra copy changes how the baby’s body and brain develop, which can cause both mental and physical challenges for the baby.
Detailed explanation-2: -A gain or loss in the number of chromosomes from the normal 46 is called aneuploidy. A common form of aneuploidy is trisomy, or the presence of an extra chromosome in cells.
Detailed explanation-3: -That is, this extra genetic material could disrupt the process through which information carried in the genes is decoded, therefore modifying the cellular function.
Detailed explanation-4: -Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes the developmental changes and physical features of Down syndrome.