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Rate of mutation is affected by
Biology Botany Class 12th NEET UG NEET UG Preparation
Q. 11 of Quiz-1437 (Que-ID : 2929)
Rate of mutation is affected by
- temperature
- X rays
- gamma rays
- all of these
Ans → (d)all of these
Explanation → all of these
This question is taken from this post → Principles of Inheritance and Variations (Class 12th - Biology) Revision Test | MCQs For NEET - attemp/practice
More MCQs in - Principles of Inheritance and Variations (Class 12th - Biology) Revision Test | MCQs For NEET
Q. 1 of Quiz-1437 (Que-ID : 2919)
A recessive allele is expressed in
- heterozygous condition only
- homozygous condition only
- F3 generation
- both homozygous and heterozygous conditions.
Q. 2 of Quiz-1437 (Que-ID : 2920)
The characters which appear in the first filial generation are called
- recessive characters
- dominant characters
- holandric characters
- lethal characters
Q. 3 of Quiz-1437 (Que-ID : 2921)
What will be the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus ?
- 3:01
- 1:02:01
- 1:01
- None of the above
Q. 4 of Quiz-1437 (Que-ID : 2922)
In a monohybrid cross between two heterozygous individuals, percentage of pure homozygous individuals obtained in F1 generation will be
- 25%
- 50%
- 75%
- 100%
Q. 5 of Quiz-1437 (Que-ID : 2923)
What is the probability of production of dwarf offsprings in a cross betweeen two heterozygous tall pea plants ?
- Zero
- 50%
- 25%
- 100%
Q. 6 of Quiz-1437 (Que-ID : 2924)
Which of the following crosses will give tall and dwarf pea plants in same proportions ?
- TT × tt
- Tt × tt
- TT × Tt
- tt × tt
Q. 7 of Quiz-1437 (Que-ID : 2925)
Which of the following is incorrect regarding ZW – ZZ type of sex determination ?
- It occurs in birds and some reptiles.
- Females are homogametic and males are heterogametic.
- 1:1 sex ratio is produced in the offsprings
- All of these
Q. 8 of Quiz-1437 (Que-ID : 2926)
A couple has six daughters. What is the possibility of their having a girl next time ?
- 10%
- 50%
- 90%
- 100%
Q. 9 of Quiz-1437 (Que-ID : 2927)
Number of autosomes present in liver cells of a human female is
- 22 autosomes
- 22 pairs
- 23 autosomes
- 23 pairs
Q. 10 of Quiz-1437 (Que-ID : 2928)
Haplodiploidy is found in
- grasshoppers and cockroaches
- birds and reptiles
- butterflies and moths
- honeybees, ants and waspe.
Q. 11 of Quiz-1437 (Que-ID : 2929)
Rate of mutation is affected by
- temperature
- X rays
- gamma rays
- all of these
Q. 12 of Quiz-1437 (Que-ID : 2930)
Two or more independent genes present on different chromosomes which determine nearly same phenotype are called
- supplementary genes
- complementary genes
- duplicate genes
- none of these
Q. 13 of Quiz-1437 (Que-ID : 2931)
Select the incorrect statement regarding pedigree analysis
- Solid symbols show unaffected individuals
- Proband is the person from which case history starts
- It is useful for genetic counsellors
- It is an analysis of traits in several generations of a family
Q. 14 of Quiz-1437 (Que-ID : 2932)
To determine the genotype of a tall plant of F2 generation, Mendel crossed this plant with a dwarf plant. This cross represents a
- test cross
- back cross
- reciprocal cross
- dihybrid cross
Q. 15 of Quiz-1437 (Que-ID : 2933)
Mendal formulated the law of purity of gametes on the basis of
- monohybrid cross
- dihybrid cross
- test cross
- back cross
Q. 16 of Quiz-1437 (Que-ID : 2934)
The inheritance of flower colour in Antirrhinum (dog flower) is an example of
- incomplete dominance
- co-dominance
- multiple alleles
- linkage
Q. 17 of Quiz-1437 (Que-ID : 2935)
Phenotypic and genotypic ratio is similar in case of
- complete dominance
- incomplete dominance
- over dominance
- epistasis
Q. 18 of Quiz-1437 (Que-ID : 2936)
What can be the blood group of offspring when both parents have AB blood group ?
- AB only
- A, B and AB
- A, B, AB and O
- A and B only
Q. 19 of Quiz-1437 (Que-ID : 2937)
Inheritance of roan coat in cattle is an example of
- incomplete dominance
- codominance
- multiple allelism
- none of these
Q. 20 of Quiz-1437 (Que-ID : 2938)
How many types of gametes can be produced by a diploid organism who is heterozygous for 4 loci ?
- 4
- 8
- 16
- 32
Q. 21 of Quiz-1437 (Que-ID : 2939)
Law of independent assortment can be explained with the help of
- dihybrid
- test cross
- back cross
- monohybrid cross
Q. 22 of Quiz-1437 (Que-ID : 2940)
Which three scientists independently rediscovered Mendel’s work ?
- Avery, McLeod, McCarty
- Sutton, Morgan and Bridges
- Bateson, Punnet and Bridges
- de Vries, Correns and Tschemark
Q. 23 of Quiz-1437 (Que-ID : 2941)
Chromosomal theory of inheritance was given by
- Morgan et al
- Sutton and Boveri
- Hugo deVries
- Gregor J. Mendel
Q. 24 of Quiz-1437 (Que-ID : 2942)
Experimental verification of ‘chromosomal theory of inheritance’ was done by
- Sutton and Boveri
- Morgan et al
- Henking
- Karl Correns
Q. 25 of Quiz-1437 (Que-ID : 2943)
Genes located very close to one another on same chromosome tend to be transmitted together and are called as
- allelomorphs
- identical genes
- linked genes
- recessive genes
More MCQs In - Biology Botany Class 12th NEET UG NEET UG Preparation
Q. 17 of Quiz- (Que-ID : 3510)
Which of the following is not done in a wild life sanctuary?
- Fauna is conserved
- Flora is conserved
- Soil and flora is utilised
- Hunting is prohibited
Q. 25 of Quiz- (Que-ID : 2868)
What is the function of filiform apparatus in an angiospermic embryo sac?
- Brings about opening of the pollen tube
- Guides the pollen tube into a synergid
- Prevents entry of more than one pollen tube into a synergid
- None of these
Q. 2 of Quiz- (Que-ID : 3295)
The phenomenon ‘ontogeny repeats phylogeny’ is explained by
- recapitualtion theory
- Inheritcance theory
- mutation theory
- natural selection theory.
Q. 7 of Quiz- (Que-ID : 1716)
Disease transmitted by the head louse is-
- Plague
- rabies
- typhoid
- scurvy
Q. 21 of Quiz- (Que-ID : 2914)
In spermatogenesis, reduction division of chromosome occurs during conversion of
- spermatogonia to primary spermatocytes
- primary spermatocytes to secondary spermatocytes
- secondary spermatocytes to spermatids
- spermatids to sperms
Q. 16 of Quiz- (Que-ID : 2734)
Classification is not based on
- Thallus organisation
- Cell structure
- Gross morphology
- Phylogenetic relationship
Q. 18 of Quiz- (Que-ID : 2686)
How many times our heart beats in a minute
- 65-59
- 70-75
- 25-45
- None of the above
Q. 15 of Quiz- (Que-ID : 3158)
Inhibitor binds to the active site of the enzyme. Hence blocking the reaction. This is an example of
- allosteric inhibition
- feedback inhibition
- uncompetitive inhibition
- competitive inhibition
Q. 4 of Quiz- (Que-ID : 3222)
The petiole is swollen and spongy in
- Nepenthes
- Trapa
- Clematis
- all of the above
Q. 20 of Quiz- (Que-ID : 3338)
During the life cycle of Plasmodium, sexual reproduction takes place in which of the following hosts ?
- Human
- Female Anopheles mosquito
- Male Anopheles mosquito
- Both (a) and (b)
Q. 25 of Quiz- (Que-ID : 2893)
Intensely lactating mothers do not generally conceive due to the
- suppression of gonadotropins
- hypersecretion of gonadotropins
- suppression of gametic transport
- suppression of fertilisation
Q. 18 of Quiz- (Que-ID : 3411)
Restriction endonuclease cuts
- One stand of DNA at specific site
- Both strands of DNA
- Both strands of DNA at any site
- Single strand of RNA
Q. 8 of Quiz- (Que-ID : 3176)
Which membrane protects the eyes of frog in water?
- Tympanum
- Skin
- Sebaceous
- Nictitating
Q. 2 of Quiz- (Que-ID : 2920)
The characters which appear in the first filial generation are called
- recessive characters
- dominant characters
- holandric characters
- lethal characters
Q. 6 of Quiz- (Que-ID : 2949)
Control of gene expression takes place at the level of
- DNA-replication
- transcription
- translation
- none of the above
Q. 12 of Quiz- (Que-ID : 3305)
Single step large mutation leading to speciation is also called
- founder effect
- saltation
- branching descent
- natural selection
Q. 6 of Quiz- (Que-ID : 2849)
From among the sets of terms given below, identify those that are associated with the gynoecium
- Stigma, ovule, embryo sac, placenta
- Thalamus, pistil, style, ovule
- Ovule, ovary, embryo sac, tapetum
- Ovule, stamen, ovary, embryo sac
Q. 24 of Quiz- (Que-ID : 3542)
The petrol used in engines filled with catalytic converter should be
- Simple petrol
- Any type of petrol
- Unleaded petrol
- None of the above
Q. 5 of Quiz- (Que-ID : 3498)
Which type of living organisms given below are listed in Red Data Book”?
- Rare species
- Rare and endangered species
- Endangered species
- None of these
Q. 20 of Quiz- (Que-ID : 3438)
First biochemical to be produced commercially by microbial cloning and genetic engineering:
- Human insulin
- Penicillin
- Interferons
- Fertility factor
Q. 5 of Quiz- (Que-ID : 3048)
TCA cycle was discovered by
- Otto Meyerhof
- Hans Kreb
- Gustav Embden
- All of these
Q. 9 of Quiz- (Que-ID : 2752)
Which of the following is male sex organs
- Insulins
- Aldosterone
- Androgens
- Pheromones
Q. 12 of Quiz- (Que-ID : 2905)
The function of the secretion of prostate gland is to
- inhibit sperm activity
- attract sperms
- stimulate sperm activity
- none of these.
Q. 22 of Quiz- (Que-ID : 2865)
Both chasmogamous and cleistogamous flowers are present in
- Helianthus
- Commelina
- Rosa
- Gossypium
Q. 9 of Quiz- (Que-ID : 3177)
Fats are richly found in
- alveolar tissue
- lymph glands
- adipose tissue
- liver cells
Q. 14 of Quiz- (Que-ID : 3057)
Aleurone layer takes part in
- protection of delicate embryo
- enzyme synthesis
- transfer of food to cotyledons
- transfer of food from cotyledons to embryo tips
Q. 5 of Quiz- (Que-ID : 3098)
The formation of first stable product of nitrogen fixation is catalysed by enzyme
- dehydrogenase
- nitrogenase
- isomerase
- none of these
Q. 4 of Quiz- (Que-ID : 3097)
The process of conversion of NO2– to N2 is called
- nitrification
- ammonification
- denitrification
- nitrogen fixation
Q. 15 of Quiz- (Que-ID : 3233)
The axillary buds arise
- endogenously from the pericycle
- exogenously from the tissues of the shoot apex
- endogenously from the cambium tissues
- exogenously from the innermost layers of cortex
Q. 17 of Quiz- (Que-ID : 2710)
Sarcoplasmic reticulum is store house of which ion
- Ca2+
- Mg2+
- Mn2+
- None of the above
Q. 17 of Quiz- (Que-ID : 2910)
spot the odd one out from the following structures with reference to the male reproductive system
- Rate testis
- Epididymis
- Vasa efferentia
- Isthmus
Q. 20 of Quiz- (Que-ID : 3213)
Formation of secondary xylem and phloem respectively
- Centrifugal and centripetal
- Centripetal and centrifugal
- Both centripetal
- Both centrifugal
Q. 13 of Quiz- (Que-ID : 2806)
Which of the following nerves is the largest of all the cranial nerves?
- Abducens nerve
- Oculomotor nerve
- Olfactory nerve
- Trigeminal nerve
Q. 23 of Quiz- (Que-ID : 2866)
Polygonum type of embryo sac is
- 8 – nucleate, 7 – celled
- 8 – nucleate, 8 – celled
- 7 – nucleate, 7 – celled
- 4 – nucleate, 3 – celled
Q. 6 of Quiz- (Que-ID : 3299)
By the statement ‘survival of the fittest’, Darwin meant that
- the strongest of all species survives
- the most intelligent of the species survives
- the cleverest of the species survives
- the species most adaptable to changes survives.
Q. 25 of Quiz- (Que-ID : 2868)
What is the function of filiform apparatus in an angiospermic embryo sac?
- Brings about opening of the pollen tube
- Guides the pollen tube into a synergid
- Prevents entry of more than one pollen tube into a synergid
- None of these
Q. 13 of Quiz- (Que-ID : 2931)
Select the incorrect statement regarding pedigree analysis
- Solid symbols show unaffected individuals
- Proband is the person from which case history starts
- It is useful for genetic counsellors
- It is an analysis of traits in several generations of a family
Q. 6 of Quiz- (Que-ID : 1855)
Who led the Salt Satyagraha movement with Gandhi?
- Annie Besant
- Mridula Sarabhai
- Muthu Lakshmi
- Sarojini Naidu
Q. 1 of Quiz- (Que-ID : 2844)
The anther wall consists of four wall layers where
- tapetum lies just inner to endothecium
- middle layers lie between endothecium and tapetum
- endothecium lies inner to middle layers
- tapetum lies next to epidermis
Q. 13 of Quiz- (Que-ID : 3456)
To avoid summer-related problems – heat and desiccation by organism is called
- Hibernation
- Suspend
- Migrate
- Aestivation
Q. 8 of Quiz- (Que-ID : 2876)
From the sexually transmitted diseases mentioned below, identify the one which does not specifically affect the sex organs
- Syphilis
- AIDS
- Gonorrhea
- Genital warts
Q. 6 of Quiz- (Que-ID : 3324)
Which of the following pathogens causes whooping coough ?
- Legionella spp.
- Burcella melitensis
- Vibrio cholerae
- Burcella melitensis
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