1
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
In antirrhinum two plants with pink flowers were hybridized. The F1 plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridization ? Red flower colour is determined by RR, and White by rr genes -
A
rrrr
B
rr
C
Rr
D
RR
2
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
ABO blood groups in humans are controlled by the gene I. It has three alleles – IA, IB and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur –
A
One
B
Two
C
Three
D
Four
3
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?
A
Out of one pair of factors one is dominant, and the other recessive
B
Alleles do not show any blending and both the characters recover as such in F2 generation
C
The discrete unit controlling a particular character is called a factor
D
Factors occur in pairs
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
The genotype of a plant showing the dominant phenotype can be determined by –
A
Pedigree analysis
B
Back cross
C
Test cross
D
Dihybrid cross

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