answer the question below?

3 ⤊

an individual with an extra copy of chromsome 21 has
a-sickle cell
b-hemophilila
c-colorblindness
d-down syndrome

2007-02-01 10:12:19 · 4 answers · asked by Felicia F 1 in Science & Mathematics ➔ Biology

2007-02-01 10:38:53 · answer #1 · answered by christigmc 5 · 0⤊ 0⤋

D. Down syndrome

2007-02-01 18:15:19 · answer #2 · answered by Anonymous · 1⤊ 0⤋

down syndrome is also known as trisomy 21

2007-02-01 18:16:17 · answer #3 · answered by TheAutumnPhoenix 3 · 2⤊ 0⤋

2007-02-01 18:32:59 · answer #4 · answered by Elena_Jolie 1 · 0⤊ 0⤋