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What is the inner lining of the heart called? |
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What is the heart muscle called? |
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What is the serous layer covering the heart muscle called? |
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What is the term for actual genetic makeup? |
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What is a chromosome pair that may be very different in size? |
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What are genes that are not expressed unless they are present in homozygous conditions? |
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What is it called when an individual has identical alleles for a particular trait? |
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