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Which one of the following cannot be explained on the basis of Mendel's Law of Dominance
(a)Out of one pair of factors one is dominant and the other recessive
(b)Alleles do not show any blending and both the characters recover as such in generation.
(c)Factors occur in pairs
(d)The discrete unit controlling a particular character is called a factor

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Important Questions on Principles of Inheritance and Variation
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blood groups in humans are controlled by the gene It has three alleles and Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

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

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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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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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Which one of the following is a wrong statement regarding mutations ?

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F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of :

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A test cross is carried out to:

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The idea of mutations was brought forth by:
