JOIN ADRE 2.0 Telegram Group

Objective Questions with Answers on Biology

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]

Arrangement of chromosomes in the order of decreasing length is termed as Idiogram. Idiogram is a composite photograph or diagram of metaphasic chromosomes of haploid or diploid set of an organism arranged in a series of decreasing size, thickness position of centron-iere and shape.

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 [C]

The correct answer is sex linked. Sex-linked traits are determined by genes located on the sex chromosomes. Sex-limited traits are determined by genes located on autosomes and express only in one sex. While these traits are responsible considerably for sexual dimorphism, sex-influenced traits do not show distinctive expression between women and men.

Advertisement
APSC CCE PRELIMS Mock Test - 1 Start Test
APSC CCE PRELIMS Mock Test - 2 Start Test

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

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]

Tjio and Levan's contribution is very significant because they gave the number of human chromosomes. In 1956, Tjio and Levan were the first to accurately describe that humans have 46 chromosomes. This discovery was technically the first very low-resolution whole-genome analysis and opened the field of clinical cytogenetics.

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]

Polytene or giant chromosomes are found in Salvary glands of Drosophila. Polytene chromosomes are found in dipteran flies: the best understood are those of Drosophila, Chironomus and Rhynchosciara. They are present in another group of arthropods of the class Collembola, a protozoan group Ciliophora, mammalian trophoblasts and antipodal, and suspensor cells in plants.

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]

The correct answer is The centromere in the former is terminal and the later is subterminal.

NCERT Class 12 Biology Solved Multiple Choice Questions

Read More Biology Questions

APSC PRELIMS FULL LENGTH MOCK TEST

Take Mock Tests

Government Schemes Mock Test Start Test!
Political Science Mock Test – 42 Start Test
History Test – 190 Start Test
Quantitative Aptitude Test Start Test!
Data Interpretation - Mock Test Start Test!
General Awareness - Mock Test Start Test!
Reasoning Ability - Mock Test Start Test!

Chapters

UPSC Biology Questions & Answers

apsc cce prelims 2024 test series