How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?

(1) Five

(2) Six

(3) Eight

(4) Seven

Subtopic:  Introduction to Genetics: 2 |
 95%
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NEET - 2015
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Which one from those given below is the period of Mendel's hybridisation experiments?

(1) 1856 - 1863

(2) 1840 - 1850

(3) 1857 - 1869

(4) 1870 - 1877

Subtopic:  Introduction to Genetics: 2 |
 91%
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NEET - 2017
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Among the following characters, which one was not considered by Mendel in his experiments on pea?

(1) Stem - Tall or Dwarf

(2) Trichomes - Glandular or Non-glandular

(3) Seed - Green or Yellow

(4) Pod - Inflated or Constricted

Subtopic:  Introduction to Genetics: 2 |
 94%
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NEET - 2017
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Thalassemia and sickle-cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

(1) Both are due to a qualitative defect in globin chain synthesis

(2) Both are due to a quantitative defect globin chain synthesis

(3) Thalassemia is due to less synthesis of globin molecules

(4) Sickle-cells anaemia is due to a quantitative problem of globin molecules

Subtopic:  Mendelian Disorders: Thalassemia |
 67%
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NEET - 2017
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A disease caused by an autosomal primary non-disjunction is 

(1) Down's syndrone

(2) Kilnerfelter's syndrome

(3) Turner's syndrome

(4) Sickle-cell anemia

Subtopic:  Non - Disjunction & Aneuploidy |
 59%
NEET - 2017
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The mechanism that causes a gene to move from one linkage group to another is called 

(1) inversion

(2) duplication

(3) translocation

(4) crossing-over

Subtopic:  Understanding Linkage |
 58%
NEET - 2016
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A true breeding plant is

(1) one that is able to breed on its own

(2) produced due to cross-pollination among unrelated plants

(3) near homozugous and produces offspring of its own kind

(4) always homozygous recessive in its genetic constitution

Subtopic:  Monohybrid Cross: 1 |
 62%
NEET - 2016
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If a colourblind man marries a woman who is homozygous for normal colour vision, the probalility of their son being colourblind is 

(1) 0

(2) 0.5

(3) 0.75

(4) 1

Subtopic:  Sex Linked Recessive Inheritance |
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NEET - 2016
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A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the F1 plants were selfed the resulting genotypes were in the ratio of 

(1) 1 : 2 : 1 :: Tall heterozygous : tall homozygous : Dwarf

(2) 3 : 1 :: Tall : Dwarf

(3) 3 : 1 :: Dwarf : Tall

(4) 1 : 2 : 1 :: Tall homozygous : Tall heterogygous : Dwarf

Subtopic:  Monohybrid Cross: 1 |
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Pick out the correct statements.

I. Haemophilia is a sex-linked recessive disease

II. Down's syndrome is due to aneuploidy.

III. Phenylketonuria is an autosomal recessive gene disorder

IV. Sickle cell anaemia is an x - linked recessive gene disorder

(1) II and IV are correct

(2) I, III and IV are correct

(3) I, II and III are correct

(4) I and IV are correct

Subtopic:  Mendelian Disorders |
 75%
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NEET - 2016
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