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Which one of the following Mendelian traits can be
expressed in the presence of its identical allele
only?
1. Green pod 
2. Axial pod
3. Constricted pod 
4. Round seed

Which of the following represents back cross?
1. AA $\times$ Aa
2. Aa $\times$ ab
3. Aa $\times$ Aa
4. More than one option is correct

Which one of the following crosses would have
1 : 1 : 1 : 1 ratio?
1. TTRR × ttrr
2. TtRR × TTrr
3. TtRR × ttrr
4. TtRr × ttrr

In AaBBCc $\times$ AaBbCc the percentage of pure line
individuals is
1. 6.25% 
2. 12.5%
3. 18.75% 
4. 25%

Identify the incorrect statement
a. By 1902, the chromosome movement during
meiosis had been worked out.
b. Chromosome as well as genes occur in pairs
in a gamete.
c. The two alleles of a gene pair are located on
homologous sites on homologus chromosome.
d. Mendel’s work was widely published.
e. Boveri united the knowledge and chromosomal
segregation with Mendelian principles.
1. a, b & d 
2. b, d & e
3. a, c & d 
4. a, b & e

How many types of gametes are possible in
PpQqRr if genes P and Q are tightly linked?
1. Two 
2. Four
3. Eight 
4. One

Identify the recombinant type of progeny and
percentage of recombination in F₂ generation of
parents.

1. 
2. 
3. 
4. 

has sex chromosome
1. 
2. 
3. 
4. 

Fill in the blanks and choose the correct option.
(i) The mutation which arises due to change in a
single base pair of DNA, is known as __A    .
(ii)   B    causes frameshift mutations.
(iii) In   C   mutation GAG changes to GUG.

A normal man and woman, both of whom have
colour-blind father, what percentage of their
daughter would be colour-blind?
1. 0% 
2. 25%
3. 50% 
4. 75%

How many of the given genetic disorders are sexlinked?

1. Four 
2. Three
3. Five 
4. Two

How many of the given symptoms are correct for an
individual showing trisomy of 21st chromosomes?
a. Physical, psychomotor and mental
development is retarded.
b. Shows presence of gynecomastia.
c. Furrowed tongue.
d. Sterile females with rudimentary ovaries.
e. Palm is broad with characteristic palm crease.
f. Short statured with partially open mouth.
1. Four 
2. Three
3. Five 
4. Two

The diseased phenotype of sickle cell anaemia is
1. X^hY 
2. Hb^AHb^S
3. Hb^SHb^S 
4. X^hX

Which of the following statement is correct with respect to
Haemophilia?
1. Criss cross inheritance
2. It is Y-linked dominant disease
3. X-linked disease
4. Both (1) & (3)

Number of linkage groups present in human male
and female are respectively
1. 23, 24 
2. 23, 23
3. 24, 23 
4. 24, 24

Find correct match
    Column I              Column II
a. Monosomy          (i) 2n + 1
b. Trisomy              (ii) 2n – 2
c. Nullisomy           (iii) 2n – 1
d. Tetrasomy          (iv) 2n + 2
1. a(iii), b(ii), c(i), d(iv) 
2. a(iii), b(i), c(ii), d(iv)
3. a(iii), b(ii), c(iv), d(i) 
4. a(i), b(ii), c(iii), d(iv)

Choose the incorrect option with respect to blood grouping.

Select wrongly matched pair.

27 : 1 : 1 : 27 test cross ratio of Hutchinson cross
for grain colour and size of endosperm in maize
suggests that the distance between the linked genes
is
1. 3.6 cM
2. 96.4 cM
3. 48.2 cM
4. 1.8 cM

Choose incorrect statement with respect to given figure.

1. The genotype is represented as ZW
2. It produces single type of gamete
3. It is responsible for sex determination
4. It is heterogametic

Heteropycnotic X chromosome found in nucleus of
polymorphonuclear leucocytes of human females is
called
1. X-body
2. Sex chromatin
3. Y-spots
4. More than one option is correct

Fruit flies are one of the best materials for genetic studies because of all, except
1. Ability to grow on simple synthetic medium in the laboratory
2. Short life span
3. Production of a large number of progeny in each mating
4. Presence of few externally visible and identifiable contrasting traits

Two different types of gametes in terms of the sex chromosomes, are produced by
1. Female fruit fly 
2. Male butterfly
3. Male human and female Drosophila 
4. Female birds

Phenylketonuria is an inborn error of metabolism that is inherited as
1. Autosomal recessive trait 
2. Sex-linked dominant trait
3. X-linked recessive trait 
4. Autosomal dominant trait

Mark the odd one with respect to syndrome which occur due to failure of segregation of homologous pair of chromosomes during cell division cycle.
1. Klinefelter's syndrome 
2. Down's syndrome 
3. Turner's syndrome 
4. Thalassemia

Heterozygous tall and violet flowered pea plants were selfed and total 512 seeds are collected. What will be total number of seeds for both heterozygous traits?
1. 128 
2. 256 
3. 384 
4. 64

Mark the odd one (with respect to F2 generation of Mendelian dihybrid cross)
1. Frequency of TtRR genotype = 12.5% 
2. Frequency of ttrr genotype = 6.25%
3. Frequency of TTRR genotype = 6.25% 
4. Frequency of ttRr genotype = 25%

Morgan hybridised yellow-bodied, white-eyed females to brown-bodied, red-eyed males and intercrossed their F₁ progeny. He observed that
(a) F₂ ratio was deviated very significantly from the 9 : 3 : 3 : 1 ratio
(b) Both genes did not segregate independently of each other
(c) Recombinant types are not obtained in F₂ generation
(d) Both genes segregate independently of each other
Select the correct set of statements :
1. (a) & (b) only 
2. (b) & (c) only 
3. (b) & (d) only 
4. (c) & (d) only

A Y-linked gene is responsible for hypertrichosis (long hair on ears). When an affected man marries a normal woman, what percentage of their daughters would be expected to have hairy ears?
1. 25% 
2. 0% 
3. 50% 
4. 100%

Find out the frequency of AabbCcDdee if parents are AabbCCddEe and AabbccDdee
1. 0.78% 
2. 12.5% 
3. 25% 
4. 50%

Progeny with blood group ‘O’ can not be obtained in cross
1. A×A 
2. A×B 
3. O×AB 
4. B×B

Epistasis and dominance are respectively
1. Intragenic, Intergenic 
2. Non-allelic, Extra-allelic
3. Non-allelic, Interallelic 
4. Intergenic, Non-allelic

Lesch Nyhan disease is an X-linked recessive disorder that causes neurological damage in human beings. A survey of 500 mates from a caucasion population revealed that 20 were effected with this disorder. What is the frequency of the normal allele in this population?
1. 9.6 
2. 0.8 
3. 0.096 
4. 96

How many types of zygotic combinations are possible between a cross Aa BB Cc Dd × AA bb Cc DD?
1. 32 
2. 128 
3. 64 
4. 16

A pleiotropic gene : 
1. Controls multiple traits in an individual.
2. Is expressed only in primitive plants.
3. Is gene evolved during Pliocene
4. Controls a trait only in combination with another gene

An abnormal human baby with 'XXX' sex chromosomes was born due to 
1. Fusion of two sperm and one ovum 
2. Formation of abnormal sperms in the father
3. Formation of abnormal ova in the mother 
4. Fusion of two ova and one sperm

In a population of 1000 individuals 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is 
1. 0.4 
2. 0.5 
3. 0.6 
4. 0.7

When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often superior of both its parents. This phenomenon is called 
1. Metamorphosis 
2. Heterosis 
3. Transformation 
4. Splicing

ABO blood grouping is controlled by gene I which has three alleles and show co-dominance. There are six genotypes. How many phenotypes in all are possible? 
1. Six 
2. Three 
3. Four 
4. Five

Select the incorrect statement from the following: 
1. Galactosemia is an inborn error of metabolism
2. Small population size results in random genetic drift in a population
3. Baldness is a sex-limited trait
4. Linkage is an exception to the principle of independent assortment in heredity