NCERT Biology - Objective Questions and Answers

Questions

36 Arrangement of chromosomes in the order of decreasing length is termed as

A Pedigree

B Eugenetics

C Idiogram

D Dysengenics

Answer: Option [C]

37 Traits controlled by genes located on autosomes are said to be

A sex affected

B sex influenced

C sex linked

D genetic traits

Answer: Option [D]

38 Tjio and Levan's contribution is very significant because they

A gave the number of human chromosomes

B pointed out mutational changes

C identified barr bodies

D detected sex linkage

Answer: Option [A]

39 Polytene or giant chromosomes are found in

A Salvary glands of man

B Salvary glands of woman

C Salvary glands of all animals

D Salvary glands of Drosophila

Answer: Option [D]

40 Telocentric chromosome differs from acrocentric chromosome in that

A The former has subterminal centromere whereas the later has a centrally located centrosome

B The centromere in the former is terminal and the later is subterminal

C The former has a terminal centromere and the later has a medially located centromere

D None of the above

Answer: Option [B]

Objective Questions with Answers on Biology