Different molecular forms of a gene

Phenotype is defined as the external appearance of an individual for any trait. It is observable and is determined by different combinations of alleles. For example, in the pea plant, the coloured flower represented by the genotype CC and Cc and the white flower represented by the genotype cc are the two phenotypes.

Match the following lists: List - I List - II (A) Back cross It is the genetic make up of an individual. (B) Test cross (II) An individual is having two different alleles for a single character. Consequently, it will produce two different types of gametes with reference to a gene. (C) Heterozygote (III) An individual is having two similar or identical alleles for a single character. Hence, it will produce only one kind of gametes with reference to a gene. (D) Homozygote (IV) If the F 1 progeny are mated back to one of their parents. (V) The cross between F 1 progeny (or heterozygotes) and their recessive homozygous parent. The correct match is:

A = IV , B = V , C = II , D = III

A = IV , B = V , C = I , D = II

A = V , B = III , C = I , D = II

A = V , B = IV , C = II , D = I

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The factors (now known as gene) on chromosomes regulating the characters are called the genotype and the physical expression of the chraracters is called .

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Important Questions on Principles of Inheritance and Variation

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Monohybrid cross is a cross of ________.

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

The minimum number of plants to be screened to obtain a plant of the genotype

AabbCcDd

from a cross between plants of genotypes

AaBbCcDd

and

AABbCCDd

is:

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

The two alleles that determine the blood group AB of an individual are located on

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

The production of gametes by the parents, formation of zygotes, the

F_{1}

and

F_{2}

plants, can be understood from a diagram called:

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Alleles are:

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

How many types of gametes can be produced by individual with the genotype AAbb?

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

A true breeding plant is:

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Write any two differences between genotype and phenotype.

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Explain Hardy Weinberg Principle with the help of a Punnett square.

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Define the term ‘recessive’.

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

A true breeding plant is__________

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

If the gene pool of the locus X in the human genome is 4, then what would be the highest possible number of genotypes in a large population?

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Give appropriate biological or technical terms for the following:

The condition in which a pair of chromosomes carry similar alleles of a particular character.

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

F_{1}

hybrid shows characters of both the parents, then it is due to

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Define phenotype.

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Write the difference between Linkage and crossing over.

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Genetic constitution of an organism is called _____ (genotype/phenotype).

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Which ONE of the following statements is INCORRECT?

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Give any two traits studied by Mendel.

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of One gene

Match the following lists:

	List - I		List - II
(A)	Back cross		It is the genetic make up of an individual.
(B)	Test cross	(II)	An individual is having two different alleles for a single character. Consequently, it will produce two different types of gametes with reference to a gene.
(C)	Heterozygote	(III)	An individual is having two similar or identical alleles for a single character. Hence, it will produce only one kind of gametes with reference to a gene.
(D)	Homozygote	(IV)	If the $F_{1}$ progeny are mated back to one of their parents.
		(V)	The cross between $F_{1}$ progeny (or heterozygotes) and their recessive homozygous parent.

The correct match is:

The factors (now known as gene) on chromosomes regulating the characters are called the genotype and the physical expression of the chraracters is called .

Important Questions on Principles of Inheritance and Variation

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