In the given below figure what does (a) and (b) represent

1.  GAG, Glumatic acid

2.  GUG, Valine

3.  GAG, Valine

4.  GUG, Glumatic acid 

Subtopic:  Mendelian Disorders: Sickle Cell Anemia |
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Choose odd one out with respect to chromosomal disorder

1.  Down's syndrome

2.  Klinefelter's syndrome

3.  Turner's syndrome

4.  Thalassemia 

Subtopic:  Mendelian Disorders: Thalassemia |
 94%
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Morgan worked with the tiny fruit flies - Drosophila melanogaster, which were suitable for genetical studies, as

a.  They could be grown on simple medium

b.  They complete their life cycle in about two weeks

c.  Single mating could produce a large number of progeny flies

d.  No clear cut sexual dimorphism is found 

1.  Only d is incorrect

2.  Both a and d are incorrect

3.  Only b is correct

4.  Both c and d are incorrect 

Subtopic:  Chromosomal Basis of Inheritance: Introduction |
 85%
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Match the following

   Column-l                       Column-ll

a.  Haemophilia               i.  Rudimentary ovaries

b.  Sickle cell anaemia     ii.  X-linked recessive

c.  Turner's syndrome      iii.  Gynaecosmastia

d.  Klinefelter's                iv.  Autosomal recessive 
     syndrom

a.  a(ii), b(iv), c(i), d(iii)

b.  a(ii), b(iv), c(iii), d(i)

c.  a(iv), b(ii), c(i), d(iii)

d.  a(iv), b(i), c(ii), d(iii) 

Subtopic:  Mendelian Disorders: Sickle Cell Anemia | Mendelian Disorders: Hemophilia | Sex Aneuploidy - Turner & Klinefelter Syndrome |
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Who noticed that the behaviour of chromosomes is parallel to the behaviour of genes?

1.  Temin and Baltimore

2.  Correns and Tschermak

3.  Beadle and Tatum

4.  Sutton and Boveri 

Subtopic:  Chromosomal Basis of Inheritance: Introduction |
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Experiment verification of the chromosomal theory of inheritance was given by

1.  Sutton and Boveri 

2.  Thomas Hunt Morgan

3.  de Vries

4.  Mendal 

Subtopic:  Chromosomal Basis of Inheritance: Introduction |
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In human ABO group system ________ different alleles allow the possibility of _______ different types of genotypes in population.

1.  3, 4

2.  2, 4

3.  3, 6

4.  6, 3 

Subtopic:  Dominance Deviation from Mendel: 1 |
 77%
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The phenotype of an individual may be affected if the modified allele produces

A.  The normal/less efficient enzyme

B.  No enzyme at all

C.  A non-functional enzyme

1.  Only A is correct 

2.  Only C & A are correct

3.  Only B is correct

4.  B & C are correct 

Subtopic:  Dominance Deviation from Mendel: 2 |
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Ability of a gene to have multiple phenotypic effects is known as

1.  Co-dominance 

2.  Pleiotropy

3.  Multiple allelism

4.  Incomplete dominance 

Subtopic:  Polygenic Inheritance & Pleiotropy |
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Morgan and his group observed when the two genes in a dihybrid cross were situated on the same chromosome, the proportion of parental gene combinations were much higher than the non-parental type, this is due to

1.  Independent assortment 

2.  Linkage

3.  Crossing over

4.  Competence 

Subtopic:  Understanding Linkage |
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