whateverthisis8
whateverthisis8 whateverthisis8
  • 24-11-2021
  • Biology
contestada

Down's syndrome occurs because of a(n)



missing sex chromosome



extra sex chromosome



additional 21st chromosome



additional 18th chromosome

Respuesta :

nahida5353 nahida5353
  • 24-11-2021

Answer:

C.Additional 21st chromosome

Explanation:

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