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

(1) AA and AA

(2) AA and aa

(3) Aa and Aa

(4) aa and aa

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

(1) Characters are controlled by discrete units called factors.

(2) Factors occur in pairs.

(3) Every factor has alternate forms known as alleles

(4) 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? 

(1) Francis crick

(2) Gregor Mendel

(3) Hugo de vries

(4) W. Bateson

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

(1) TT and Tt

(2) tt and tt

(3) tt and Tt

(4) Tt and Tt

Trait expressed in F1 generation is 

(1) Parental

(2) Recessive

(3) Dominant

(4) Recombinant

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

(1) TT, Tt, tt

(2) TT, tt

(3) TT

(4) tt

Which of the following is a monohybrid? 

(1) TT

(2) tt

(3) Tt

(4) None

Test cross is used to predict the

(1) Phenotype of test organism

(2) Sex of test organism

(3) Genotype of test organism

(4) Genotypic ratio.

Genotypic and phenotypic ratios of monohybrid cross are

(1) 3:1 and 1:2:1

(2) 1:2:1 and 3:1

(3) 1:2:1 and 1:2:1

(4) 3:1 and 3:1

What is the means of segregation in Law of segregation? 

(1) Allelic separation

(2) Chromosomal separation

(3) Crossing over

(4) Linkage