1
NEET 2014
MCQ (Single Correct Answer)
+4
-1
A man whose father was colour blind marries a women who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?
A
50%
B
25%
C
0%
D
75%
2
NEET 2015
MCQ (Single Correct Answer)
+4
-1
A gene showing codominance has :
A
alleles tightly linked on the same chromosome
B
one allele dominant on the other
C
both alleles independently expressed in the heterozygote
D
alleles that are recessive to each other
3
NEET 2015
MCQ (Single Correct Answer)
+4
-1
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?
A
1
B
Nil
C
0.25
D
0.5
4
NEET 2015
MCQ (Single Correct Answer)
+4
-1
A pleiotropic gene -
A
is a gene evolved during Pliocene
B
is expressed only in primitive plants
C
Controls multiple traits in an individual
D
controls a trait only in combination with anther gene
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