PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It provides information about the size of the nucleus
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It provides information about how closely related different species are
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It gives information about the amount of DNA a species has
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It gives information about the number of genetic diseases in different species
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Detailed explanation-1: -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.
Detailed explanation-2: -Comparative analysis of DNA sequences from multiple species at varying evolutionary distances is a powerful approach for identifying coding and functional noncoding sequences, as well as sequences that are unique for a given organism.
Detailed explanation-3: -Because the DNA sequence determines a protein’s amino acid sequence, a gene shared by two closely related organisms should have similar, or even identical, amino acid sequences. That’s because closely related species most likely diverged from one another fairly recently in the evolutionary span.
Detailed explanation-4: -Comparative genomics is a branch of biology that compares genome sequences across different species to identify their similarities and differences. This field of research is important because it: Helps us better understand evolution, and how living things have adapted over time.
Detailed explanation-5: -GenBank – a genetic database that serves as an annotated collection of DNA sequences. Clustal Omega – an alignment program that compares multiple sequences of DNA.