MEDIUM

Earn 100

Explain the law of independent assortment.

Important Questions on Principles of Inheritance and Variation

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

EASY

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

With increasing age, the linkage ___.

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

Assertion (A): The proportion of parental gene combinations was much lighter than non-parental type

Reason (R): Gene combination is due to linkage of the two genes

MEDIUM

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

The genetic distance between genes

A

and

B

10 cM

. An organism with

Ab

combination of the alleles is crossed with the organism with

aB

combination of alleles. What will be the percentage of the gametes with

AB

allele combination by an

F_{1}

individual?

MEDIUM

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

In Morgan's experiment with Drosophila, when a yellow bodied white-eyed female was crossed with brown bodied red-eyed male and their

F_{1}

Progeny were intercrossed. What was the percentage of recombinants in the

F_{2}

generation?

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:

EASY

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

The ratio of dihybrid cross is

EASY

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

Two genetic loci controlling two different traits two different traits are linked. During the inheritance of these traits, the Mendelian laws that would be affected is/are:

EASY

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

Experimental verification of the chromosomal theory of inheritance was done by

EASY

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

Who proposed the chromosomal theory of inheritance?

HARD

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

In a testcross involving F₁ dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates:

MEDIUM

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

Mendel's dihybrid ratio is