For how many years Gregor Mendel conducted hybridisation experiments on garden peas?

  • 5

  • 7

  • 14

  • 34

How many true breeding pea plant varieties had been selected by Mendel?

  • 1

  • 7

  • 14

  • 16

A true-breeding plant line can be obtained by

  • Cross pollination

  • Self pollination

  • Continuous Cross pollination

  • Continuous Self pollination

How many pairs of contrasting traits studied by Mendel were related to pod?

  • 1

  • 2

  • 3

  • 4

Among the given pea plant traits identify the odd one

  • Violet flower

  • Yellow seed

  • Yellow pod

  • Axial flower position

Which of the following does not contribute to Mendel’s success?

  • Large sampling size

  • Statistical analysis

  • Performed experiments on single variety of pea

  • Performed experiments on successive generations

“Filial 1 progeny” refers to

  • First pure breed

  • First offspring

  • First hybrid generation

  • Second hybrid generation

What is the cause of variation? 

  • Asexual reproduction

  • Amitosis

  • Mitosis

  • Meiosis

How many laws of Mendel are based on monohybrid cross?

  • 1

  • 2

  • 3

  • 4

A cross between tall and dwarf plant was performed and 120 offspring were produced in which 90 plants were tall and 30 were dwarf. Find out the genotype of their parents. 

  • Tt and TT

  • Tt and Tt

  • TT and tt

  • tt and tt

A cross between tall pea plant and its recessive parent is known as 

  • Back cross

  • Test cross

  • Recessive cross

  • Dominant cross

What will be the genotype of parental plants if they produced 25 AA : 48 Aa : 26 aa 

  • AA and AA

  • AA and aa

  • Aa and Aa

  • aa and aa

Which of the following was not explainedby the Mendel’s law of dominance? 

  • Characters are controlled by discrete units called factors.

  • Factors occur in pairs.

  • Every factor has alternate forms known as alleles

  • In a dissimilar pair of factors one member of the pair dominatesthe other.

Who was the first to use statistical analysis and mathematical logics for solving biological problems? 

  • Francis crick

  • Gregor Mendel

  • Hugo de vries

  • W. Bateson

If F2 dwarf plants were self-pollinated then the genotype of F3 & F4 plants is 

  • TT and Tt

  • tt and tt

  • tt and Tt

  • Tt and Tt

Trait expressed in F1 generation is 

  • Parental

  • Recessive

  • Dominant

  • Recombinant

In a true breeding tall or dwarf pea variety the possible set of allelic pair(s) of genes for height are

  • TT, Tt, tt

  • TT, tt

  • TT

  • tt

Which of the following is a monohybrid? 

  • TT

  • tt

  • Tt

  • None

Test cross is used to predict the

  • Phenotype of test organism

  • Sex of test organism

  • Genotype of test organism

  • Genotypic ratio.

Genotypic and phenotypic ratios of monohybrid cross are

  • 3:1 and 1:2:1

  • 1:2:1 and 3:1

  • 1:2:1 and 1:2:1

  • 3:1 and 3:1

What is the means of segregation in Law of segregation? 

  • Allelic separation

  • Chromosomal separation

  • Crossing over

  • Linkage

Incomplete dominance is present in

  • Snapdragon flower

  • Dog flower

  • Antirrhinum flower

  • All of the above

ABO blood grouping provides an example of

(i) co-dominance

(ii) Multiple allelism

(iii) Incomplete dominance

  • i and iii

  • i and ii

  • ii and iii

  • i, ii and iii

A cross was performed between pea plants P1 (violet flower) and P2 (white flower). If obtained progeny showed ratio of 1 (violet) : 1 (white) , then determine the genotype of P1. 

  • Homozygous recessive

  • Heterozygous

  • Homozygous dominant

  • Can’t be determined

Recessive allele of an enzyme coding gene may be responsible for the production of

  • The normal/less efficient enzyme

  • A non-functional enzyme

  • No enzyme at all

  • Any of the above.

Genes which code for a pair of contrasting traits are known as

  • Factors

  • Alleles

  • Linked genes

  • Lethal genes

ABO blood groups are controlled by which gene

  • a

  • I

  • b

  • All of the above

Co-dominance refers to the condition where F1

  • resembles the dominant parent

  • is in-between the parents

  • resembled the recessive parents

  • resembles both the parents

What does Blending inheritance refers to? 

  • Mixed characters in an offspring

  • Dominant character

  • Recessive character

  • Dominant & recessive character

In human ABO blood grouping possible number of genotypes is

  • 3

  • 4

  • 6

  • 9

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Practice Botany Quiz Questions and Answers