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Savatey [412]
2 years ago
15

Down syndrome in humans may result from. A a person inheriting a recessive allele. B sickle-shaped cells becoming stuck in blood

vessels.c an extra copy of chromosome 21. D blood failing to clot properly.
Biology
1 answer:
katen-ka-za [31]2 years ago
8 0
C born with an extra chromosome
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