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Write a short note on turner syndrome.

Important Questions on Principles of Inheritance and Variation

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
In the following human pedigree, the filled symbols represents the affected individuals. Identify the type of given pedigree.


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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
Which of the following most appropriately describes haemophilia?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
A colourblind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their sons being colourblind?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
Match the human disorders shown in Group I with the biochemical processes in Group II. Choose the correct combination.
 
Group I Group II
P. Phenylketonuria i. Melanin synthesis
Q. Albinism ii. Conversion of Phenylalanine to Tyrosine
R. Homocystinuria iii. Tyrosine degradation
S. Argininemia iv. Methionine metabolism
  v. Urea Synthesis
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders

Correct the following statement, if there is any mistake:

Turner’s syndrome is due to the presence of an additional copy of the X chromosome. 
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
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.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
A couple has two sons and two daughters. Only one son is colour blind and the rest of the siblings are normal. Assuming colour blindness is sex-linked, which ONE of the following would be the phenotype of the parents?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
Write notes on Turner syndrome.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
Draw the diagram of chromosomes of Turner syndrome.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
People suffering from albinism cannot synthesize:
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
How many number of barr body will be present in female suffering from Turner's syndrome?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
Children suffering from phenylketonuria are given food low in phenylalanine and supplemented with tyrosine. This is because they
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
An abnormal human baby with 'XXX' sex chromosomes was born due to:
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders

A woman heterozygous for colour blindness marries a colour-blind man. What would be the ratios of carrier daughters, colour-blind daughters, normal sons, and colour-blind sons in the F1 generation?

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
Consider the following pedigree over four generations and mark the correct answer below about the inheritance of haemophilia.

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
What is Turner's syndrome?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
Name a human genetic disorder due to the following :
Deletion of one X-chromosome in a female
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Genetic Disorders
A human female with Turner's syndrome