Plant Breeding & Genetics Mcqs - Set 17

1)   Cells intercommunicates with neighbouring cells by_________________?

a. Plasmedesmata
b. Plasmedesmata
c. Trachieds
d. Nessels
Answer  Explanation 

ANSWER: Plasmedesmata

Explanation:
No explanation is available for this question!


2)   Male sterility in flowering plant was first reported by___________________?

a. Stout (1917)
b. Koelreuter (1763)
c. Brewbaker (1810)
d. Gerstel (1900)
Answer  Explanation 

ANSWER: Koelreuter (1763)

Explanation:
No explanation is available for this question!


3)   Breeder seed is the progeny of__________________?

a. Cenified seed
b. Nucleus seed
c. Foundation
d. Registered seed
Answer  Explanation 

ANSWER: Nucleus seed

Explanation:
No explanation is available for this question!


4)   Gene for gene hypothesis was proposed by__________________?

a. Nelson (1973)
b. Flor (1956)
c. Robinson (1971)
d. Vander plank (1963)
Answer  Explanation 

ANSWER: Flor (1956)

Explanation:
No explanation is available for this question!


5)   Heterosis results due to____________________?

a. Dominance
b. Overdominance
c. Epistasis
d. All the above
Answer  Explanation 

ANSWER: All the above

Explanation:
No explanation is available for this question!


6)   capsicum is a rich source of___________________?

a. Vitamin A
b. Vitamin C
c. Vitamin D
d. None of the above
Answer  Explanation 

ANSWER: Vitamin A

Explanation:
No explanation is available for this question!


7)   Two allelie genes are located on_______________________?

a. Two homologous chromosomes
b. Two non homologous chromosomes
c. Any two chromosomes with one each
d. Same chromosomes
Answer  Explanation 

ANSWER: Two homologous chromosomes

Explanation:
No explanation is available for this question!


8)   If a plant is heterozygousand is designated (BbMm)and produces two kinds of gametes either (BM)or (bm), then the possibility of (bm) gametes fertilizing either (BM) or (bm) is_________________?

a. Half
b. 0/1
c. 1/1
d. 1/4
Answer  Explanation 

ANSWER: Half

Explanation:
No explanation is available for this question!


9)   Diagrammatic representation of the chromosomes of an organism arranged according to their size is called_____________________?

a. Ideogram
b. Gene map
c. Karyotype
d. Phenotype
Answer  Explanation 

ANSWER: Ideogram

Explanation:
No explanation is available for this question!


10)   The process of transfer and deletion of several gene is_____________________?

a. Gene mutation
b. Chromosomal mutation
c. Monoploldy
d. Synapsis
Answer  Explanation 

ANSWER: Chromosomal mutation

Explanation:
No explanation is available for this question!


11)   Maize has 10 pairs of chromosomes. how many linkage groups will be present if all the genes are mapped__________________?

a. 10
b. 20
c. 20
d. 20
Answer  Explanation 

ANSWER: 10

Explanation:
No explanation is available for this question!


12)   An individual with two identical members of a part of geneue factors is called__________________?

a. Hybrid
b. Homozygous
c. Heterozygous
d. Dominant
Answer  Explanation 

ANSWER: Homozygous

Explanation:
No explanation is available for this question!


13)   Plants can be made disease resistant by___________________?

a. Colchicines treatment
b. Heat treatment
c. Breeding with the wild variety
d. Hormone spray
Answer  Explanation 

ANSWER: Breeding with the wild variety

Explanation:
No explanation is available for this question!


14)   The first organisms to appear on the earth were more like plants than animals because__________________?

a. Plants can manufacture their own food material
b. There are more plants than animals
c. Plants are similar in structure
d. None of the above
Answer  Explanation 

ANSWER: Plants can manufacture their own food material

Explanation:
No explanation is available for this question!


15)   Evolution proceed on account of____________________?

a. Conversion pf organism to change of environment
b. Fossils
c. Adaptations through genervation
d. Struggle for existence
Answer  Explanation 

ANSWER: Adaptations through genervation

Explanation:
No explanation is available for this question!


16)   Organic evolution through large discontinuous variations was propound by__________________?

a. Mendel
b. Darwin
c. Huge and Vnes
d. Lamak
Answer  Explanation 

ANSWER: Huge and Vnes

Explanation:
No explanation is available for this question!


17)   One of the persons whose evolutionary ideas were close to that of Laraarcd was____________________?

a. Lysendo
b. Vavilow
c. Weismann
d. H be vnes
Answer  Explanation 

ANSWER: Lysendo

Explanation:
No explanation is available for this question!


18)   When an albino plant of maize (female) is crossed with normal green plant (male) all plants in the progeny are albino because___________________?

a. Albinism is dominant over green characters
b. Green plastids of male parent become nitrated
c. Plastids are inherited through maternal parents
d. Crossing over results in structural changes in green plastids
Answer  Explanation 

ANSWER: Plastids are inherited through maternal parents

Explanation:
No explanation is available for this question!


19)   Number of lindage groups of chromosomes____________________?

a. Diploid number of chromosomes
b. Tetraploid number of chromosomes
c. Haploid number of chromosomes
d. None of the above
Answer  Explanation 

ANSWER: Haploid number of chromosomes

Explanation:
No explanation is available for this question!


20)   One of the following is not an advantage of genetic engineering___________________?

a. Microbes act as biological factories
b. Improvement of crop can take place
c. The gene pool is maintained
d. Genetic error can be rectified
Answer  Explanation 

ANSWER: The gene pool is maintained

Explanation:
No explanation is available for this question!