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Rats are medium-sized rodents that have long tails and are similar to mice. Rats have 42 chromosomes, or 21 pairs.

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9y ago
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14y ago

The rat genome has 42 chromosomes (2x20 autosomes, 2 sex chromosomes).

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9y ago

The rats do have 21 pairs of chromosomes.

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11y ago

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Q: How many pairs of chromosomes does a rat have?
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