1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder ?
A
50%
B
100%
C
75%
D
25%
2
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Which one of the following conditions though harmful in itself, is also a potential saviour from a mosquito borne infectious disease ?
A
Pernicius anaemia
B
Thalassaemia
C
Leukemia
D
Sickle cell anaemia
3
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Which of the following is the example of pleiotropy ?
A
Thalassemea
B
Haemophilia
C
Sickle cell anaemia
D
Colour blindness
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
There are three genes a, b and c. The percentage of crossing over between a and b is 20%, b and c is 28% and a and c is 8%. What is the sequence of genes on chromosome
A
a, b, c
B
b, a, c
C
a, c, b
D
None
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