In humans karyotype of 47, XXY leads to  

(1) Klinefelter’s syndrome

(2) Turner’s syndrome

(3) Down’s syndrome

(4) Edward’s syndrome

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Furrowed tongue and partially open mouth are characteristics of

(1) Edward’s syndrome

(2) Turner’s syndrome

(3) Down’s syndrome

(4) Klinefelter’s syndrome.

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      Column I

     Column II  

i. Down’s syndrome

a. Broad palm with characteristic palm crease

ii. Klinefelter’s syndrome   

b. Gynaecomastia

iii. Turner’s syndrome

c. rudimentary ovaries

 

d. XO

 

e. XXY

 

f. physical development is retarded.

Choose the correct match:

(1) i-c,d; ii-b,e,f; iii-a

(2) i-e,c; ii-b,f; iii-a,d

(3) i-a; ii-b,e,f; iii-c,d

(4) i-a,c; ii-d,e; iii-b,d

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Turner’s syndrome is caused by

(1) Absence of Y chromosome

(2) Absence of one of the ‘X’ chromosome

(3) Trisomy of chromosome number 21

(4) Additional copy of chromosome ‘X’.

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In the results, F2 generation of Mendelian dihybrid cross in pea plant. The ratio of yellow and wrinkled seeded pea plant is

(1) 1/16

(2) 3/16

(3) 4/16

(4) 7/16

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What will be the ratio of homozygous dominant, homozygous recessive and pure heterozygous traits in F2 generation in pea plant is

(1) 1 : 1 : 8

(2) 2 : 3 : 2

(3) 1 : 1 : 2

(4) 2 : 2 : 6

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In the results, F2 generation of Mendelian dihybrid cross in pea plant. The ratio of yellow and wrinkled seeded pea plant to the yellow and round seeded pea plant is

(1) 1 : 2

(2) 1 : 4

(3) 1 : 3

(4) 3 : 5

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Law of Independent Assortment is not applicable to 

(1) Linked genes

(2) Genes on different chromosomes

(3) Distantly located gene

(4) both (2) and (3)

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Which of the following statement is correct?

(1) Mendel’s work remained unrecognised till 1920.

(2) Mendel’s work suggested that factors were discrete units.

(3) Mendel provided physical proof of the existence of factors.

(4) He used geographical approaches to solve the problems of biology.

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Who rediscovered Mendel’s laws?

(1) de Vries

(2) Correns

(3) Von Tschermak

(4) all of these

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