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

Earn 100

A plant with a full green pod is said to be homozygous dominant. A plant with constricted yellow pod is said to be homozygous recessive. Crossing of these two plants can give rise to plants with full yellow pods. Plants with constricted green pods are also observed. Workout a cross for such type and explain its phenotypic ratio.

Important Questions on Inheritance and Variation

HARD

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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:

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

The maximum number of different gametes of the pollens produced by a tall pea plant with round, yellow, seeds of the genotype

TtRrYY

, if the three loci are unlinked, would be

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

F_{1}

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

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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>Inheritance and Variation>Mendelian Inheritance

Monohybrid cross is a cross of ________.

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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:

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

In mice black coat color (allele $' B'$ ) is dominant to brown coat color (allele $' b'$ ). The offspring of a cross between a black mouse $(BB)$ and a brown mouse $(bb)$ were allowed to interbreed. What percentage of the progeny would have black coats ?

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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>Inheritance and Variation>Mendelian Inheritance

What is the possible genotypic ratio in

F_{2}

generation if a plant producing red flowers

(RR)

is crossed with another plant of the same species that produces white flowers

(rr) ?

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

A true breeding plant is:

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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

F_{1}

and

F_{2}

plants, can be understood from a diagram called:

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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>Inheritance and Variation>Mendelian Inheritance

Assertion (A): Two copies of the gene are the two allelic forms of which, one allele produces a non-functional enzyme.
Reason (R): The modified allele is generally the recessive allele.
The correct option among the following is:

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

A true breeding plant is__________

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

The ratio of long-winged and vestigial winged Drosophila are formed when a pure long-winged (dominant) and a pure vestigial winged (recessive) Drosophila are crossed:

MEDIUM

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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:

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

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

EASY

Biology>Genetics and Evolution>Inheritance and Variation>Mendelian Inheritance

Alleles are:

Important Questions on Inheritance and Variation

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