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

Different molecular forms of a gene

HARD

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The Punnett square shown below represents the pattern of inheritance in dihybrid cross when yellow (Y) is dominant over white (y) and round (R) is dominant over wrinkled (r) seeds:-

YR Yr yR ry
YR F J N R
Yr G K O S
yR H L P T
ry I M Q U

A plant of 'H' type will produce seeds with the genotype identical to seeds produced by the plants of:-

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Important Questions on Principles of Inheritance and Variation

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

A homozygous tall pea plant is crossed with its homozygous recessive parent. Find out the genotypic and phenotypic ratio with the help of Punnet square method.

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

A cross wạs carried out between two individuals, heterozygous for two pairs of genes. Assuming segregation and independent assortment, the number of different genotypes and phenotypes obtained respectively would be

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Identify which one of the following is a test cross.

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

According to Mendel, ........................ segregate and ..................... assort independently.

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the

F_{1}

plants were selfed the resulting genotypes were in the ratio

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

A true breeding plant is:

HARD

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

How will you find that F1 Hybrid is homozygous or heterozygous? Explain it with suitable example.

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

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 Two genes

A round seeded tall pea plant is crossed with round seeded dwarf plant and obtained progeny are with following phenotypes
$3$ - Tall, Round
$3$ - Dwarf, Round
$1$ - Tall, Wrinkled
$1$ - Dwarf, Wrinkled

The possible genotype of parents:

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Some of

F_{2}

progeny are formed during dihybrid cross between round and yellow

(\overset{↑}{o})

and wrinkled and green

(\overset{\circ}{+})

pea plants. Their genotypes are:

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

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:

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

In human beings, brown eye (B) is dominant over blue eye (b). A brown-eyed couple has a blue-eyed child. What are the possible genotypes of the couple?

MEDIUM

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

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?

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Alleles are:

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

Monohybrid cross is a cross of ________.

EASY

Biology>Genetics and Evolution>Principles of Inheritance and Variation>Inheritance of Two genes

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