If a man consists of an extra copy of chromosome number 18, then the condition is known as

(1) Monosomy

(2) Trisomy

(3) Nullisomy

(4) Polyploidy

Subtopic:  Non - Disjunction & Aneuploidy |
 84%
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Down’s syndrome was first described in the year

(1) 1962

(2) 1866

(3) 1856

(4) 1863

Subtopic:  Non - Disjunction & Aneuploidy |
 60%
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Gynaecomastia refers to

(1) Masculine development in females

(2) Development of breasts in males

(3) Development of female characters in male

(4) Reduced breasts in the female

Subtopic:  Sex Linked Inheritance: Characteristics |
 78%
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In humans karyotype of 47, XXY leads to  

(1) Klinefelter’s syndrome

(2) Turner’s syndrome

(3) Down’s syndrome

(4) Edward’s syndrome

Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
 93%
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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.

Subtopic:  Non - Disjunction & Aneuploidy |
 92%
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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

Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
 89%
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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’.

Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
 83%
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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

Subtopic:  Dihybrid Cross: Details |
 71%
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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

Subtopic:  Monohybrid Cross: Further Understanding |
 79%
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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

Subtopic:  Dihybrid Cross Analysis |
 80%
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