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In man, gene producing the disease phenylketonuria also produces a number of abnormal phenotypic traits, which are collectively called a syndrome. This gene results in mental retardation, widely spaced incisors, pigmented patches on the skin and excessive sweating. Such types of genes are called

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Important Questions on Principles of Inheritance and Variation

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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-2>Q 79
A man with a certain disease marries a normal woman. They have eight children (3 daughters and 5 sons). All the daughters suffer from their father's disease, but none of the sons is affected. What will be the mode of inheritance of this disease?
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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-2>Q 80
Which is a dominant trait
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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-2>Q 81
Albinism is a congential disorder resulting from the lack of enzyme
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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-2>Q 82
A male human is heterozygous for autosomal genes A and B and is also hemizygous for hemophilic gene h. What proportion of his sperms will be abh?
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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-2>Q 83
Which of the following is not associated with Barr-bodies:-
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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-2>Q 84

Phenylketonuria is

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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-2>Q 85
Which is mismatched
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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-2>Q 86
The most common and prevalent Mendelian disorders are:-
(a) Haemophilia
(b) Cystic fibrosis
(c) Sickle cell anaemia
(d) Colour blindness