Important question

36. F1 generation means

(A)

first flowering generation

(B)

first fertile generation

(C)

first filial generation

(D)

first seed generation

37. Filial means

(A)

offsprings produced in sexual reproduction

(B)

offsprings produced in asexual reproduction

(C)

offsprings produced in vegetative reproduction

(D)

both (B) and (C)

38. F2 generation is produced by

(A)

crossing F1 progeny with one of the parents

(B)

selfing the heterozygous progeny

(C)

selfing the parents

(D)

a cross between recessive parents

39. In genetics, the use of checkerboard was done by

(A)

Mendel (B) Correns

(C)

Punnet (D) Darwin

40. Mendel, in his experiments

(A)

maintained qualitative records

(B)

maintained quantitative records

(C)

conducted ample crosses and reciprocal crosses

(D)

all of the above

41. To eliminate chance factor, Mendel performed

(A)

monohybrid cross

(B)

dihybrid cross

(C)

reciprocal cross

(D)

trihybrid cross

42. Mendel always started his experiment (Monohybrid and Dihybrid cross) with

(A)

any pea plant

(B)

a heterozygous plant

(C)

a pure line plant

(D)

a fresh new plant

43. Mendel carried out artificial cross by

(A)

emasculation of selected female parent plant

(B)

emasculation of selected male parent plant

(C)

dusting of pollen grains from selected male plant over selected female plant

(D)

both (A) and (C)

44. Emasculation means

(A)

removal of stamens before anthesis

(B)

removal of stigma before anthesis

(C)

removal of petals before anthesis

(D)

removal of sepals before anthesis

45. In pea flower, how many stamens are free and how many are fused?

(A)

1, 9 (B) 2, 8

(C)

5, 5 (D) 4, 6

46. F3 generation was obtained by

(A)

selfing F1 hybrids

(B)

selfing F2 hybrids

(C)

crossing F1 with either of parent

(D)

none of these

47. What result did Mendel obtained after monohybrid cross between tall and dwarf pea plant?

(A)

All new plants were dwarf

(B)

All new plants were tall

(C)

50% plants were dwarf and 50% plants were tall

(D)

75% plants were tall and 25% plants were dwarf

48. When Mendel allowed natural selfing of F1 hybrids during monohybrid cross between pure tall and pure dwarf pea plant, he found

(A)

all plants were tall

(B)

all plants were dwarf

(C)

dwarfness reappeared in some plants

(D)

tallness reappeared in some plants

49. When Mendel selfed F1 generation, he obtained 1064 seeds in F2 generation out of 1064 seeds, _______ were tall and ______ were dwarf.

(A)

882, 299 (B) 787, 277

(C)

787, 277 (D) 651, 207

50. During monohybrid cross experiments, Mendel performed reciprocal cross by selecting

(A)

tall plant as male and dwarf plant as female

(B)

tall plant as female and dwarf plant as male

(C)

both male and female plant as tall

(D)

both male and female plant as dwarf

51. After performing reciprocal cross between tall and dwarf plants, the ratio of tall and dwarf plants obtained was

(A)

1:2 (B) 3:1

(C)

1:3 (D) 2:1

important questions for NEET-UG 2013

Biology.

 The Mendelian principles of inheritance were rediscovered by

(A)

Sutton and Boveri

(B)

Hugo de Vries, Tschermark and Correns

(C)

Lederberg and Tatum

(D)

Morgan

  Mendel’s work was rediscovered by three biologists from which of the following countries?

(A)

Holland, France and England

(B)

Holland, England and Austria

(C)

Germany, France and England

(D)

Austria, Holland and Germany

 Mendel selected pea plant because of

(A)

its short life span

(B)

it produced many seeds and large flowers

(C)

many contrasting characters

(D)

all of these

 The botanical name of garden pea is

(A)

Pisum sativum

(B)

Lathyrus odoratus

(C)

Mangifera indica

(D)

Solanum tuberosum

 Which of the following is a dominant character in pea?

(A)

Wrinkled seeds

(B)

Inflated pod

(C)

Terminal flower

(D)

Dwarf plant

 Which of the following character was not considered by Mendel?

(A)

Seed coat colour

(B)

Wrinkled or round leaves

(C)

Tallness or dwarfness

(D)

Position of flower

  An inherited character and its detectable variant is called

(A)

allele

(B)

trait

(C)

gene

(D)

both (A) and (B)

 Which one of the following best describes a gene?

(A)

A triplet of nucleotide bases

(B)

A specific length of DNA responsible for the inheritance and expression of the character

(C)

A specific length of single stranded RNA

(D)

Both (B) and (C)

  Mendel’s “factors” are in fact

(A)

units (B) chromosomes

(C)

genes (D) none of these

  Who coined the term ‘gene’ for ‘factor’?

(A)

Mendel (B) Morgan

(C)

Johannsen (D) Punnett

  Alleles or allelomorphs occupy

(A)

same position on homologous chromosomes

(B)

same position on heterozygous chromosomes

(C)

different position on homologous chromosomes

(D)

different position on heterozygous chromosomes

  Who proposed the term 'Allelomorph'?

(A)

Hugo De Vries (B) Morgan

(C)

Tschermak (D) Bateson

  Dominant allele means

(A)

an allele whose effect is masked by another allele

(B)

an allele that prevents the expression of the other allele

(C)

an allele without any effect

(D)

an allele which cannot express in presence of other

  The external appearance of an individual for any trait is called as

(A)

phenotype (B) karyotype

(C)

morphology (D) physique

32. Genotype is

(A)

genetic constitution of an organism

(B)

genetic constitution of somatic cells

(C)

genetic constitution of plastids

(D)

genetic constitution of germ cells

33. Homozygous individuals

(A)

breeds true to the trait

(B)

does not breed true to the trait

(C)

produce only one type of gamete

(D)

both (A) and (C)

34. Which of the following term indicates a pair of dissimilar alleles?

(A)

Homozygous (B) Heterozygous

(C)

Homologous (D) All of these

35. A cross between two pure individuals, differing in atleast one set of characters, is called

(A)

monohybrid (B) polyploid

(C)

mutant (D) variant