hey my name is anna .. i am a 9th grader.. i am in biology and theres this question that i dont understand.i have reaserched and i dont seem 2 find it ... PLZ help me ... i beg u .. PLZ help me
THE QUESTION IS: How does the karyotype of a person with down syndrome differ from a norml karyotype?
a) it lacks a chromosome.
b) it has two s e x chromosomes.
c) it occurs in XO individuals
d)It has an extra copy of a chromosome.
2006-11-08 11:50:30 · 6 answers · asked by anna 2 in Science & Mathematics ➔ Biology
D there is an extra copy of chromosome 21 in many individuals with down syndrome. It doesn't have to be a complete copy, but for the purpose of your question D is definitely correct.
2006-11-08 11:53:21 · answer #1 · answered by student_doctor_chris 2 · 1⤊ 0⤋
D. A person with Down Syndrome has one extra 21st chromosome.
2006-11-08 20:03:27 · answer #2 · answered by Rei-chan 3 · 0⤊ 0⤋
Down's syndrome is the result of having an extra 21st chromosome.
2006-11-08 19:53:40 · answer #3 · answered by Anonymous · 1⤊ 0⤋
the answer is d. downs syndrome is also known as trisomy 21, the "tri" meaning that there are three of chromosome #21.
2006-11-08 19:58:19 · answer #4 · answered by joplinette 2 · 0⤊ 0⤋
i believe extra copy of chromosome
D
2006-11-08 19:58:49 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Historically karyoptypes have sided with the militant zionists on just about every topic. I guess the quickest way for me to answer this question is to have you go see the Borat movie.
2006-11-08 19:59:00 · answer #6 · answered by Anonymous · 0⤊ 2⤋