In a marriage between male with blood group A and female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of the parents?

  •  IA i (Male) ; IB IB (Female)

  •  IA IA (Male) ; IB IB (Female)

  •  IA IA (Male) ; IB i (Female)

  •  IA i (Male) ; IB i(Female)

In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?

  •  Thalassemia

  • Klinefelter's Syndrome

  •  Phenylketonuria

  •  Turner's Syndrome

The production of gametes by the parents the formation of zygotes, the F1 and F2 plants can be understood using

  •  Pie diagram

  •  A pyramid diagram

  •  Punnett square

  •  Wenn diagram

Experimental verification of the chromosomal theory of inheritance was done by:

  • Sutton

  • Boveri

  • Morgan

  • Mendel

Select the correct match

  •   Phenylketonuria - Autosomal dominant trait

  •   Sickle cell anemia - Autosomal recessive trait chromosome - 11

  •   Thalassemia - X linked

  •   Haemophilia - Y linked

Identify the wrong statement with reference to the gene 'I' that controls ABO blood groups.

  •  A person will have only two of the 3 alleles.

  •  When IA and IB are present together, they express same type of sugar.

  • Allele 'i' does not produce any sugar.

  •  The gene (I) has three alleles. 

How many true-breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

  •   2

  •   14

  •   6

  •   4 

Chromosomal theory of inheritance was proposed by :

  • Sutton and Boveri

  • Bateson and Punnet

  • T. H. Morgan

  • Watson and Crick

The number of contrasting characters studied by Mendel for his experiments was :

  • 14

  • 4

  • 2

  • 7

The best example for pleiotropy is:-

  • Skin color

  • Phenylketonuria

  • Colour Blindness

  • ABO Blood group

Represented below is the inheritance pattern of the certain type of traits in humans. Which one of the following conditions could be an example of this pattern ?

  • Sickel cell anaemia

  •   Haemophilia
  •   Thalassemia
  •   Phenylketonuria

Study the pedigree chart of a certain family given below and select the correct conculusion which can be drawn for the character –

  • The parents could not have had a normal daughter for this character

  • The trait under study could not be colourblindness
  • The male parent is homozygous dominant
  • The female parent is heterozygous

In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?

  • 25%

  • 100%

  • 50%

  • 75%

What would not be true regarding Down’s Syndrome?
1.    It is also known as trisomy 21
 
  • 4.    The extr chromosome 21 material may also occur due to a Robertsonian translocation in 2–4% of cases.
  • 2.&nsp;   The parents of the affected individual are usually affected from the disorder.
  • 3.    There is no ure for Down syndrome.
  • 4
The mode of inheritance shown by filled symbols in the given pedigree is most likely:
  • Autosomal recessive
  • Autosomal dominant
  • Sex-linked recessive
  • Sex-linked dominant
During Mendel’s investigations into inheritance patterns it was for the first time that:
 
  • experiments were conducted on garden pea
  • artificial pollination experiments were carried out
  • statistical analysis and mathematical logic were applied to problems in biology
  • all characteristics were passed to the next generation through blending inheritance
What percent of F2 progeny of a typical Mendelian monohybrid cross are expected to be true-breeding?
 
  • 25
  • 50
  • 75
  • 100
Which law is based on the fact that the alleles do not show ant blending and that both the characters are recovered as such in the F2 generation though one of these is not seen at the F1 stage?
 
  • Law of dominance
  • Law of segregation
  • Law of independent assortment
  • Law of linkage
In a cross AaBb X aabb [assuming independent assortment], what fraction of progeny are expected to be AaBb?
 
  • ¼
  • 1/3
  • ½
  • 2/3
When the two genes in a dihybrid cross are situated on the same chromosome, 
 
  • the proportion of parental gene combinations are much lower than the non-parental type
  • the proportion of parental gene combinations are much higher than the non-parental type 
  • the proportion of parental gene combinations and the non-parental type is equal
  • the two genes will always assort independently
Select the genotype amongst the given genotypes which will result in lightest skin colour in humans:
 
  • AAbbCC 
  • AABBCc
  • aaBBCC
  • AaBbCc
Which of the following describes a male in birds?
1.
2.
3.
4.
  • 1
  • 2
  • 3
  • 4
Which of the following is not aneuploidy?
  • Down’s syndrome
  • Klinefelter’s syndrome
  • Turner’s syndrome
  • Phenylketonuria
Which of the following is a dominant trait in Pisum sativum?
 
  • Yellow pod colour
  • Green seed colour
  • Axial flower position
  • Constricted pod shape
A pure tall plant is crossed with a hybrid tall plant [tall completely dominant over dwarf]. What proportion of progeny is expected to be dwarf?
 
  • 0
  • ½
  • ¼
  • ¾
The strength of linkage between two genes will be:
 
  • higher if the genes are farther from each other
  • higher if the genes are closer to each other
  • higher if gametic coupling is present
  • higher if gametic repulsion is present
Study the given diagram and select the best option:

 
  • The mating between I-1 and I-II is consanguineous
  • The first born child of I-1 and I-II is a male
  • The first born child of I-1 and I-II is a female
  • The first born child of I-1 and I-II is affected by a genetic disease
It is possible to induce mutations artificially through the use of radiations. Which of the following is especially suitable for inducing mutations in plants?
 
  • X rays
  • UV rays
  • γ rays
  • PEG
A person suffering from Klinefelter’s syndrome:
  • has 45 autosomes
  • is likely to have short stature and webbed neck
  • can develop Gynecomastia
  • have normal fertility
Identify the option where the names of scientists given in Column I are not correctly matched with their contribution in Genetics?
COLUMN I COLUMN II
1. De Vries, Correns, Tschermak Disproved Mendel’s law of Independent Assortment
2. Sutton and Boveri Gave the chromosomal theory of inheritance
3. Alfred Sturtevant Developed the first genetic map
4. T. H. Morgan Discovery of the white-eyed mutation in the fruit fly
  • 1
  • 2
  • 3
  • 4
0:0:1


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