HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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No mutation has occurred to the DNA sequence.
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A nitrogen base has been deleted from the DNA molecule.
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A nitrogen base has replaced another nitrogen base in the DNA molecule.
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A nitrogen base has been added to the DNA molecule.
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Detailed explanation-1: -Every child gets 50% of their genome from each parent, but it is always a different 50%. During meiosis, gametes get a random chromosome from each pair. This means that there are over 8 million possible DNA combinations from 23 chromosome sets!
Detailed explanation-2: -The order of nitrogenous bases in DNA determines the order of amino acids in proteins.
Detailed explanation-3: -Changes at the nucleotide level go on to influence the transcription and translation from gene to protein expression. Changing even just one nitrogen base in a sequence can alter the amino acid that is expressed by that DNA codon, which can lead to a completely different protein being expressed.
Detailed explanation-4: -Comparative genomics is a field of biological research in which researchers use a variety of tools to compare the complete genome sequences of different species. By carefully comparing characteristics that define various organisms, researchers can pinpoint regions of similarity and difference.