Plant Genetics MCQ (2023) - Shasyadhara Agriculture

Read MCQ on Plant Genetics. Topics: Plant DNA/RNA, Chromosome, History of plant genetics, Heterosis, Meiotic division, Backcross method, Epistasis, Interspecific crosses, Genetic drift.

Also read: Plant Breeding, Genetics, Multiple Choice Questions (MCQ)

Plant Genetic MCQ

Question 01. Which is one of the four base found in DNA?

(a). Adenine
(b). Cytosine
(c). Thymine
(d). All of the above

Question 02. RNA contains the same bases as DNA except:

(a). Uracil replaces thymine
(b). Uracil replaces adenine
(c). Uracil replaces cytosine
(d). Uracil replaces guanine

Question 03. Material of chromosome is called

(a). Chromatin
(b). Euchromatin
(c). Chromonemata
(d). None of the above

Question 04. Who is the father of plant genetics?

(a). Charles Darwin
(b). G. H. Hardy
(c). Gregor Mendel
(d). W. Weinberg

Question 05. Mendel studied

(a). Trait inheritance
(b). DNA inheritance
(c). RNA inheritance
(d). All of the above

Also read: Methods of Plant Breeding: MCQ

Plant Genetic MCQ (Multiple Choice Questions)

Question 06. Gregor Mendol was

(a). Augustinian priest
(b). English priest
(c). Polish priest
(d). Irish priest

Question 07. What is heterosis?

(a). Sterility due to hybridization
(b). Vigor due to hybridization
(c). Incompatibility due to hybridization
(d). None of the above

Question 08. According to the according to the position of the centromere which is true about chromosome?

(a).Metacentric : Centromere is located approximately at the centre of the chromosome. Their arms are approximately equal and they appear U or V shape during movement.

(b). Sub- metacentric: When the centromere lies a little distance away from the middle of the chromosomes may be called sub-metacentric.

(c). Sub- telocentric: Centromere is located at sub-terminal position of the chromosome. One arm is much longer than the other. They appear J or L-shaped during movement.

(d) Acrocentric or telocentric: Centromere is located at the end (terminal) of the chromosome.This is the most common karyotypes among fish species, and also it is found in a variety of distantly related fish taxa.

(a). Only a and b are true
(b). Only a, b and c are true
(c). Only b and d are true
(d). All are true

Question 09. What is the Centromeric index (range) of telocentric chromosome?

(a). 15
(b). >15
(c). <15
(d). None of the above

Question 10. first meiotic division is called

(a). Reduction division
(b). Equational division
(c). Both a and b
(d). None of the above

Also read: Plant Breeding Objective Questions

Fundamentals of plant genetics

Question 11. Second meiotic division is called

(a). Reduction division
(b). Equational division
(c). Both a and b
(d). None of the above

Question 12. What happens during equational division?

01: Sister chromatids in each secondary gametocyte separate.
02: Sister chromatids are parceled into either two sperm cells or into the egg and second polar body.
03: Sister chromatids are parceled into either 4 sperm cells or into the egg and second polar body.

(a). Only 1 is true
(b). Only 1 and 3 are true
(c). Only 1 and 2 are true
(d). All are true

Question 13. What happens during reduction division?

01: The chromosome number is reduced from the diploid (paired) state to the haploid (unpaired) state.
02: The homologues that form each chromosome pair separate and are parceled into the single daughter cells (for males.
03: When the chromosomes divide, they are not parceled into maternal and paternal sets.

(a). Only 1 is true
(b). Only 2 is true
(c). Both 1 and 2 are true
(d). Only 1 and 3 are true

Question 14. Which is true about backcross method?

01: The variety which receives gene is ‘recipient parent’ and variety which is the source of gene is called as ‘donor parent’.

02: Recipient parent is used repeatedly hence also named as ‘recurrent parent’.

03: Donor parent is used every time

04: Repeated backcrossing leads to homozygosity at the same rate as in case of selfing

(a). 1, 3 and 4 are true
(b). 1, 2 and 4 are true
(c). Only 1 and 4 are true
(d). All are true

Question 15. Which of the following chemical doubles chromosome?

(a). Oryzalin
(b). Colchicine
(c). Both a and b
(d). None of the above

Also read: MCQ on Breeding of Ornamentals

Plant Hybridization MCQ

Question 16. Seedless water melon is

(a). Haploid
(b). Diploid
(c). Triploid
(d). Tetraploid

Question 17. Dahlia is

(a). Septaploid
(b). Pentaploid
(c). Hexaploid
(d). Octaploid

Question 18. Which is an example of forty four set?

(a). Pineapple
(b). Custard apple
(c). Black mulberry
(d). White mulberry

Question 19. What is epistasis?

(a). Interaction between genes which determine a genotype
(b). Interaction between genes which determine a phenotype
(c). Both a and b
(d). None of the above

Question 20. Types of epistasis are

(a). Dominant and recessive
(b). Polymeric gene interaction
(c). Dominant inhibitory and duplicate recessive
(d). All of the above

Also read: Genetics and Plant Breeding Important Terminologies

Plant breeding MCQ

Question 21. In summer squash, the color white is dominant on green and yellow. This is a case of: .

(a). Recessive epistasis
(b). Polymeric gene interaction
(c). Dominant epistasis
(d). Dominant inhibitory

Question 22. Chemical malvidin is produced by Primula plant. Production of this chemical is determined by the K gene where the suppression of its production is determined by the D gene. Both of these genes are dominant characteristics.

There is no expression of a dominant D allele even in the presence of dominant K allele. This interplay of the alleles can be classified as:

(a). The dominant inhibitory type of epistasis
(b). Polymeric gene interaction type epistasis
(c). Both a and b
(d). None of the above

Question 23. Interspecific crosses are

(a). Fully sterile
(b). Mostly sterile
(c). Fully fertile
(d). None of the above

Question 24. Genetic drift is also known as:

(a). Random genetic drift
(b). Allelicdrift
(c). Whrighteffect
(d). All of the above

Question 25. The DNA in plant cells is found in:

(a). Thenucleus
(b). The mitochondria
(c). Thechloroplast
(d). All of the above

Also read: Plant Tissue Culture MCQ

Answer Key

1.	d	6.	a
2.	a	7.	b
3.	a	8.	d
4.	c	9.	c
5.	a	10.	a

11.	b	16.	c
12.	c	17.	d
13.	d	18.	c
14.	b	19.	b
15.	c	20.	d

21.

22.

23.

24.

25.