Question

WILL FAN AND MEDAL !!!!
Sickle-cell anemia is a genetic disorder in which red blood cells take on an abnormal crescent shape.
People who do not have sickle-cell anemia possess the following nucleotide and amino acid sequences:
CTG ACT CCT GAG GAG AAG TCT
Leu Thr Pro Glu Glu Lys Ser

People who do have sickle-cell anemia possess the following nucleotide and amino acid sequences:
CTG ACT CCT GTG GAG AAG TCT
Leu Thr Pro Val Glu Lys Ser

Answer 1

Whats the question?

Answer 2

Sickle-cell anemia is an example of
A. a chromosomal mutation.
B. a gene mutation.
C. nondisjunction.
D. crossing-over.

Answer 3

Look at the 4th amino acid. In normal person, it's Glu while in abnormal persons, its Val. See the sequence, Adenine is substituted by thymine.
This is a whole gene and there is a mutation in one of the amino acid sequence, so can u tell now what it should be??

Answer 4

Is it B?

Answer 5

Obviously