Chromosomes with genes $\mathrm{abcdefg}$ becoming $\mathrm{abedcfg}$ is :

Important Questions on Principles of Inheritance and Variation

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Beta Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>EXERCISE- I (Conceptual Questions)>Q 281

Gene mutation is :

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Beta Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>EXERCISE- I (Conceptual Questions)>Q 282

The ultimate source of variation is:
 

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Beta Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>EXERCISE- I (Conceptual Questions)>Q 284

Dihybrid test cross ratio proposed by Mendel is

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Beta Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>EXERCISE- II (Previous Year Questions)>Q 1

In a family, father has a blood group 'A' and mother has a blood group 'B'. Their children show $50\%$ probability for a blood group 'AB' idicating that -

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Beta Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>EXERCISE- II (Previous Year Questions)>Q 2

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

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Beta Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>EXERCISE- II (Previous Year Questions)>Q 3

Which one of the following conditions though harmful in itself, is also a potential saviour from a mosquito borne infectious disease:

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Beta Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>EXERCISE- II (Previous Year Questions)>Q 4

Which of the four couples claiming the baby with $\mathrm{O}+$ blood type are possibly the biological parents of it?

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Beta Question Bank for Medical: Biology>Chapter 27 - Principles of Inheritance and Variation>EXERCISE- II (Previous Year Questions)>Q 5

When a red grain variety of wheat is crossed with another white grain variety a ${\mathrm{F}}_1$ -hybrid is produced. On selfing of this ${\mathrm{F}}_1$ - hybrid, how many offsprings of ${\mathrm{F}}_2$ - generation resemble phenotypically to it's parents (let grain colour of wheat controlled by three gene pairs)