The correct statement about genetic material is:
Chromosomes are made up of genes.
Here’s a brief explanation for the incorrect statements:
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Genes encode deoxyribonucleic acid: This is misleading; genes are segments of DNA (which is deoxyribonucleic acid), rather than encoding it.
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Centromeres connect two chromosomes: This is incorrect; centromeres are the regions that connect two sister chromatids within a single chromosome, not two separate chromosomes.
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Chromatids contain chromosomes: This statement is also incorrect; chromatids are copies of a chromosome that are joined together at the centromere before cell division.
So, the statement "Chromosomes are made up of genes." is the only accurate statement.