2004
NEET
MCQ
AIPMT 2004
A male human is heterozygous for autosomal
genes A and B and is also hemizygous for
hemophilic gene h. What proportion of his
sperms will be abh :-
A.
1/16
B.
1/32
C.
1/8
D.
1/4
2004
NEET
MCQ
AIPMT 2004
A normal woman, whose father was colour-blind
is married to a normal man. The sons would be :-
A.
All colour-blind
B.
75 % colour-blind
C.
All normal
D.
50% colour-blind
So, woman is carrier
2004
NEET
MCQ
AIPMT 2004
Lack of independent assortment of two genes A
and B in fruit fly Drosophila is due to :-
A.
Linkage
B.
Recombination
C.
Repulsion
D.
Crossing over
2004
NEET
MCQ
AIPMT 2004
In a plant, red fruit (R) is dominant over yellow
fruit (r) and tallness (T) is dominant over
shortness (t). If a plant with RRTt genotype is
crossed with a plant that is rrtt
A.
75% will be tall with red fruit
B.
25% will be tall with red fruit
C.
50% will be tall with red fruit
D.
All the offspring will be tall with red fruit
2003
NEET
MCQ
AIPMT 2003
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
2003
NEET
MCQ
AIPMT 2003
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%
2003
NEET
MCQ
AIPMT 2003
Pattern baldness, moustaches and beard in
human males are examples of : -
A.
Sex limited traits
B.
Sex influenced traits
C.
Sex determining traits
D.
Sex linked traits
2003
NEET
MCQ
AIPMT 2003
In Drosophila, the sex is determined by : -
A.
X and Y chromosomes
B.
Whether the egg is fertilized or develops
parthenogenetically
C.
The ratio of number of X-chromosomes to
the sets of autosomes
D.
The ratio of pairs of X-chromosomes to the
pairs of autosomes
2003
NEET
MCQ
AIPMT 2003
Two crosses between the same pair of genotypes
or phenotypes in which the sources of the
gametes are reversed in one cross, is known as : -
A.
Reciprocal cross
B.
Reverse cross
C.
Test cross
D.
Dihybrid cross
2003
NEET
MCQ
AIPMT 2003
Which one of the following traits of garden pea
studied by Mendel was a recessive feature ?
A.
Green seed colour
B.
Green pod colour
C.
Axial flower position
D.
Round seed shape
2003
NEET
MCQ
AIPMT 2003
The genes controlling the seven pea characters
studied by Mendel are now known to be located
on how many different chromosomes ?
A.
Six
B.
Seven
C.
Five
D.
Four
2002
NEET
MCQ
AIPMT 2002
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
2002
NEET
MCQ
AIPMT 2002
Which of the following is a correct match -
A.
Sickel cell anaemia = X – Chromosome
B.
Down Syndrome = 21st Chromosome
C.
Haemophilia = Y – Chromosome
D.
Parkinson Disease = X & Y Chromosome
2002
NEET
MCQ
AIPMT 2002
A diseased man marries a normal woman. They
get three daughter and five sons. All the
daughter were diseased and sons were normal.
The gene of this disease is : -
A.
Sex linked dominant
B.
Autosomal dominant
C.
Sex linked recessive
D.
Sex limited character
2002
NEET
MCQ
AIPMT 2002
Which of the following is the example of
pleiotropy ?
A.
Thalassemea
B.
Haemophilia
C.
Sickle cell anaemia
D.
Colour blindness
2002
NEET
MCQ
AIPMT 2002
A gene said to be dominant if : -
A.
It expressed only in heterozygous condition
B.
It express it's effect only in homozygous
stage
C.
It never expressed in any condition
D.
It expressed both in homozygous and
heterozygous condition
2002
NEET
MCQ
AIPMT 2002
On selfing a plant of F1 generation with
genotype “AABbCC”,the genotypic ratio in
F2 generation will be
A.
1 : 1
B.
3 : 1
C.
9 : 3 : 3 : 1
D.
27 : 9 : 9 : 9 : 3 : 3 : 3 : 1
2001
NEET
MCQ
AIPMT 2001
Independent assortment of genes does not takes
place when : -
A.
Genes are located on non-homologous
chromosome
B.
Genes are linked and located on same
chromosome
C.
Genes are located on homologous
chromosomes
D.
All the above
2001
NEET
MCQ
AIPMT 2001
A and B genes are linked. What shall be
genotype of progeny in a cross between AB/ab
and ab/ab : -
A.
AABB and aabb
B.
None
C.
AaBb and aabb
D.
AAbb and aabb
2001
NEET
MCQ
AIPMT 2001
Sickle cell anaemia is induce to : -
A.
Change of Amino acid either a or b chain
of Haemoglobin
B.
Change of Amino Acid in a chain of
Haemoglobin
C.
Change of Amino acid in both a and b
chain of Haemoglobin
D.
Change of Amino Acid in b chain of
Haemoglobin
2001
NEET
MCQ
AIPMT 2001
When dominant and recessive allels express
itself together it is called : -
A.
Dominance
B.
Pseudo dominance
C.
Co-dominance
D.
Amphidominance
2001
NEET
MCQ
AIPMT 2001
Number of Barr bodies in XXXX female is
A.
3
B.
1
C.
2
D.
4
2001
NEET
MCQ
AIPMT 2001
Probability of four son to a couple is : -
A.
$1 \over 16$
B.
$1 \over 8$
C.
$1 \over 4$
D.
$1 \over 32$
2001
NEET
MCQ
AIPMT 2001
Two nonallelic genes produces the new
phenotype when present together but fail to do so
independently then it is called : -
A.
Polygene
B.
Complimentry gen
C.
Non complimentry gene
D.
Epistasis
2001
NEET
MCQ
AIPMT 2001
Ratio of complementry genes is : -
A.
9 : 3 : 4
B.
9 : 7
C.
12 : 3 : 1
D.
9 : 3 : 3 : 4
2001
NEET
MCQ
AIPMT 2001
Male XX and female XY sometime occur due to
A.
Aneuploidy
B.
Deletion
C.
Transfer of segments in X and Y
chromosomes
D.
Hormonal imbalance
2000
NEET
MCQ
AIPMT 2000
Mongolian idiots are due to trisomy in 21st
chromosome is called :
A.
Kleinfelters syndrome
B.
Down's syndrome
C.
Turner's syndrome
D.
Triplex syndrome
2000
NEET
MCQ
AIPMT 2000
Due to the cross between TTRr × ttrr the
resultant progenies showed how many percent
plants tall, red flowered :
A.
50%
B.
100%
C.
75%
D.
25%
2000
NEET
MCQ
AIPMT 2000
According to mendelism which character is
showing dominance ?
A.
Green colour in seed coat
B.
Wrinkled seed
C.
Terminal position of flower
D.
Green pod colour
2000
NEET
MCQ
AIPMT 2000
Erythroblastosis foetalis is caused when :
A.
Rh– female & Rh+ male
B.
Rh– female & Rh– male
C.
Rh+ female & Rh+ male
D.
Rh+ female & Rh– male
2000
NEET
MCQ
AIPMT 2000
In Drosophila the XXY condition leads to
femaleness whereas in human beings the same
condition leads to Klienfelter's syndrome in
male. It proves :
A.
Y chromosome is active in sex
determination in both human beings and
Drosophila
B.
In Drosophila Y-chromosome decides
femaleness
C.
Y chromosome of man have genes for
syndrome
D.
In human beings Y chromosome is active
in sex determination