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

Question

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

Share this question with your friends

Show all Genetics MCQ

Comment

If an individual does not breed true for its characters, it is called

A. homozygote

B. allelomorph

C. hybrid

D. ecotype

Discuss this answer

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

A. clone

B. recon

C. cistron

D. codon

Discuss this answer

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

Discuss this answer

DNA duplication occurs in

A. meiosis only

B. meiosis II and mitosis

C. mitosis only

D. meiosis I and mitosis

Discuss this answer

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

Discuss this answer

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

Discuss this answer

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.

Discuss this answer

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

A. inbreeding

B. cross-breeding

C. back-crossing

D. self-fertilization

Discuss this answer

The number of characters investigated by Mendel was

A. four

B. seven

C. six

D. one

Discuss this answer

Diakinesis is characterised by

A. crossing over

B. synapse

C. chiasmata

D. terminalization

Discuss this answer

The nuclear membrane completely disappears during

A. late prophase

B. early metaphase

C. metaphase

D. interphase

Discuss this answer

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

Discuss this answer

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.

Discuss this answer

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

Discuss this answer

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

A. XXY

B. XXXY

C. XXYY

D. All of these

Discuss this answer

A chemical mutagen is

A. X-rays

B. UV-rays

C. $β$ -rays

D. 5-Bromo-Uracil

Discuss this answer

The condition in which only one allele of a pair is present is known as

A. Homozygous

B. Heterozygous

C. Hemizygous

D. Incomplete dominance

Discuss this answer

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

A. heterosis

B. hybridization

C. hypostasis

D. dominance

Discuss this answer

Linkage is

A. directly related to crossing over

B. same as translocation

C. inversely related to crossing over

D. opposite to segregation

Discuss this answer

Among the following which is a test cross?

A. TtxTt

B. TTxTT

C. TTxTt

D. Ttxtt

Discuss this answer

Reverse transcription was discovered by

A. Watson

B. Crick

C. Temin

D. Porter

Discuss this answer

Linked genes may be separated by the process of

A. gene mutation

B. segregation

C. crossing over

D. polyploidy

Discuss this answer

Dyad is

A. a pair of homologous chromosomes

B. a pair of non-homologous chromosomes

C. a pair of sister chromosomes

D. a pair of non-sister chromosomes

Discuss this answer

In humans, an example of sex-linked trait is

A. Curly hair

B. Sickle-cell anaemia

C. Colour-blindness

D. Down's syndrome

Discuss this answer

The first person to induce mutations was

A. Hugo de Vries

B. T.H. Morgan

C. Sturtevant

D. H.J. Muller

Discuss this answer

Down's syndrome is an example of

A. monosomy

B. trisomy

C. triploidy

D. polyploidy

Discuss this answer

A codon is a sequence of 3 nucleolides on

A. t-RNA

B. m-RNA

C. s-RNA

D. hn-RNA

Discuss this answer

Transfer of a gene or genes through a virus is called

A. transformation

B. transduction

C. genetic engineering

D. sex-duction

Discuss this answer

An offspring of two homozygous parents different from one another by alleles at only one gene locus is known as

A. monohybrid

B. dihybrid

C. trihybrid

D. backcross

Discuss this answer

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. $O, R H^{+}$

Discuss this answer

Accepted Answer

C. segregation

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

Correct Answer :

Show all Genetics MCQ

Related Questions

If an individual does not breed true for its characters, it is called

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

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

DNA duplication occurs in

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

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

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

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

The number of characters investigated by Mendel was

Diakinesis is characterised by

The nuclear membrane completely disappears during

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 chromosomal theroy of heredity implies that

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

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

A chemical mutagen is

The condition in which only one allele of a pair is present is known as

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

Linkage is

Among the following which is a test cross?

Reverse transcription was discovered by

Linked genes may be separated by the process of

Dyad is

In humans, an example of sex-linked trait is

The first person to induce mutations was

Down's syndrome is an example of

A codon is a sequence of 3 nucleolides on

Transfer of a gene or genes through a virus is called

An offspring of two homozygous parents different from one another by alleles at only one gene locus is known as

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

Also checkout