A human female with Turner's syndrome

has one additional X chromosome.

is able to produce children with normal husband.

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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-3>Q 54

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Study the pedigree chart given below

What does it show?

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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-3>Q 55

Which one of the following symbols and its representation, used in human pedigree analysis is correct?

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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-3>Q 56

Which one of the following cannot be explained on the basis of Mendel's Law of Dominance

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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-3>Q 57

ABO

blood groups in humans are controlled by the gene

I .

It has three alleles

I^{A} I^{B}

and

i .

Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-3>Q 58

Which one of the following conditions correctly describes the manner of determining the sex in the given example?

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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-3>Q 59

A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind?

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Alpha Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>Exercise-3>Q 60

Represented below is the inheritance pattern of a certain type of traits in humans. Which one of the following conditions could be an example of this pattern?

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