DNA duplication occurs in

Question

DNA duplication occurs in

A. meiosis only

B. meiosis II and mitosis

C. mitosis only

D. meiosis I and mitosis

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Among the following which is a test cross?

A. TtxTt

B. TTxTT

C. TTxTt

D. Ttxtt

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The term 'meiosis' was coined bv

A. Herting and Van Beneden

B. Sutton and Boveri

C. Hofmeister and Waldeyer

D. Farmer and Moore

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A functional unit of a gene which specifies synthesis of one poly-peptide is known as

A. clone

B. recon

C. cistron

D. codon

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Which one of the following chemical characteristics is not common to all living beings ?

A. Similar triplet codes for amino acids

B. Energy is stored by high energy rich phosphate bonds

C. Types of protein present in the body.

D. Ribosomes act at sites of protein synthesis

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Linked genes may be separated by the process of

A. gene mutation

B. segregation

C. crossing over

D. polyploidy

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The nuclear membrane completely disappears during

A. late prophase

B. early metaphase

C. metaphase

D. interphase

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Transfer of a gene or genes through a virus is called

A. transformation

B. transduction

C. genetic engineering

D. sex-duction

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A chemical mutagen is

A. X-rays

B. UV-rays

C. $β$ -rays

D. 5-Bromo-Uracil

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Base substitutions from base analogues I are called

A. transitions

B. transversions

C. intragenic complimentation

D. intergenic complimentation

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Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary in nature. Suppose T stands for dominant gene and t for recessive gene, the genetic make up of a person who cannot taste is

A. TT

B. Tt

C. tt

D. None of these

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The genetic constitution of an organism is known as

A. Genome

B. Genepool

C. Genotype

D. Phenotype

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The chromosomal theroy of heredity implies that

A. chromosomes are composed of DNA and protein

B. genes are composed of chromosomes

C. organism cannot live withoutchromosomes

D. genes are located on the chromosomes and are transmitted to the next generation through them.

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In humans, an example of sex-linked trait is

A. Curly hair

B. Sickle-cell anaemia

C. Colour-blindness

D. Down's syndrome

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A child is bom with an extra chromosome in each of its cells. This is usually the result of

A. nondisjunction

B. crossing over

C. segregation

D. hybridization

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The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of

A. all heterozygous tall

B. two tall and two dwarf

C. one homozygous tall, two heterozygous tall and one homozygous dwarf

D. all homozygous dwarf.

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A person meets with an accident and great loss of blood has occurred. There is no time to analyse his blood group. It is safe to transfuse blood of

A. $A B, R H^{+}$

B. $A B, R H^{-}$

C. $O, R H^{-}$

D. $O, R H^{+}$

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Mutations which are not dominant are not lost by a gene pooL This is known as

A. Survival of the dominant

B. Survival of the recessive

C. Hardly-Weinberg law

D. None of these

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A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea plant If the plant is selfed, the genotype in the Fi generation is most likely to be

A. all tall

B. 50% tall and 50% dwarf

C. all dwarf

D. data insufficient

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Klinefelter's syndrome is developed when the chromosome in male is

A. XXY

B. XXXY

C. XXYY

D. All of these

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How many meiosis will be required to produce 102 pollen-grains ?

A. 25

B. 25.6

C. 26

D. 26.5

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Lethal genes are those which

A. cause the death of the organism in which they are present

B. cause the death of the homozygous infant being formed

C. cause the death of heterozygous infant being formed

D. all of the above

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Albinism in com plants is best described as

A. lethal

B. sex-linked

C. inbred

D. dominance

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The science dealing with study of inheritance and variation is

A. Genetics

B. Evolution

C. Morphology

D. Cytology

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Chromosomes exhibit minimum coiling during

A. prophase

B. metaphase

C. interphase

D. telophase

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The best method to determine whether an individual is homozygous or heterozygous is

A. inbreeding

B. cross-breeding

C. back-crossing

D. self-fertilization

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In the Operon concept, the regulator gene regulates chemical reactions in the cell by

A. inhibiting transcription of m-RNA

B. inactivating enzymes in the reaction

C. inhibiting the substrate in the reaction

D. inhibiting the migration of m-RNA into cytoplasm

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When two genes are situated very close to each other in a chromosome

A. the percentage of crossing over between themis high

B. hardly any cross-overs detected

C. no crossing-over can ever take place between them

D. only double cross overs can take place between them.

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Diakinesis is characterised by

A. crossing over

B. synapse

C. chiasmata

D. terminalization

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Reverse transcription was discovered by

A. Watson

B. Crick

C. Temin

D. Porter

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Exhibition of superiority by a hybrid over both of its parents is called

A. heterosis

B. hybridization

C. hypostasis

D. dominance

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Accepted Answer

D. meiosis I and mitosis

DNA duplication occurs in

Correct Answer :

Show all Genetics MCQ

Related Questions

Among the following which is a test cross?

The term 'meiosis' was coined bv

A functional unit of a gene which specifies synthesis of one poly-peptide is known as

Which one of the following chemical characteristics is not common to all living beings ?

Linked genes may be separated by the process of

The nuclear membrane completely disappears during

Transfer of a gene or genes through a virus is called

A chemical mutagen is

Base substitutions from base analogues I are called

Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary in nature. Suppose T stands for dominant gene and t for recessive gene, the genetic make up of a person who cannot taste is

The genetic constitution of an organism is known as

The chromosomal theroy of heredity implies that

In humans, an example of sex-linked trait is

A child is bom with an extra chromosome in each of its cells. This is usually the result of

The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of

A person meets with an accident and great loss of blood has occurred. There is no time to analyse his blood group. It is safe to transfuse blood of

Mutations which are not dominant are not lost by a gene pooL This is known as

A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea plant If the plant is selfed, the genotype in the Fi generation is most likely to be

Klinefelter's syndrome is developed when the chromosome in male is

How many meiosis will be required to produce 102 pollen-grains ?

Lethal genes are those which

Albinism in com plants is best described as

The science dealing with study of inheritance and variation is

Chromosomes exhibit minimum coiling during

The best method to determine whether an individual is homozygous or heterozygous is

In the Operon concept, the regulator gene regulates chemical reactions in the cell by

When two genes are situated very close to each other in a chromosome

Diakinesis is characterised by

Reverse transcription was discovered by

Exhibition of superiority by a hybrid over both of its parents is called

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