Everyday Science – Genetic And Mendel’s Law of Heredity

The science of improving the hereditary qualities of future generation of mankind is referred to as.

Eugenics is the application of genetics to improve.

Which of the following statements is wrong ?

Who,amongst the following is regarded as the father of genetics ?

Hereditary characters are carried to the next generation by.

One inherited haploid set of chromosomes is called.

The suggestion that the chromosomes are the carriers of hereditary material was first made by.

Consider the following discoveries in life sciences.
1. Principal
2. Nucleus
3. DNA as the genetic material
4. Light essential for the photosynthesis
The correct chronological sequence of these discoveries is.

A pair of chromosomes determines sex in human beings and, therefore these chromosomes are called sex chromosomes What is the name given to the other chromosomes?

There are forty -six chromosomes in a normal human body cell. Compare the chromosome numbers given below with the special structure in the human body.
1. Ovum 23
2, Sperm 46
3, Kidney cells 46
4, Urinary bladder 23
Which of the above pairs are correctly matched ?

In human beings, sex is determined by the sex chromosomes X and Y. What would, then be the genetic constitution of a normal woman ?

Allosomes are chromosomes.

The cell undergoing a reduction division is called.

Sugar present in the nucleotides is.

Tijo and Levan found out.

The number of chromosomes in a normal human body cells is.

An organism that breeds true for a particular character producing identical gametes is called.

Organisms which have similar external appearance with reference to a particular character are called.

Haploid chromosome number is not seen in.

The number of chromosomes in Turner,s Syndrome is.

Genes control heredity in man and other organisms.This is.

The sex of a child is determined by the.

External manifestation of characters helps one to identify only the.

In a gamete there will be.

What is the chromosomes number in a human ovum ?

There are 23 pairs of chromosomes in man,How many types of eggs can woman produce supposing that she is Heterozygous for each of her 23 pairs of chromosomes ?

Genes are arranged in the chromosomes.

The science of heredity was called Genetics by.

Who coined the term gene ?

What are oncogenes?

The theory of jumping genes was propounded by.

Gene, the basic unit of heredity ,was first synthesized in the laboratory by.

That genes control heredity through their control on enzymes synthesis and that one gene controls the synthesis of one enzyme ____ the, one gene one enzyme hypothesis _____ was proposed by.

What is epistasis ?

Human skin colour is believed to be controlled by at least.

Changes in the number of chromosomes or gene mutations result in various kinds of genetic disorders in man listed in columan I. Match these disorder with the cause in column II and select correct answer from the codes given below the columns.
Columns I
(A) Down,s syndrome
(B) Klinefelter,s
(C) Turner,s syndrome Hemophilia
Columns II
1.Lack of an X
2. Recessive gene
3. Trisomy of chromosome 21 Additional X chromosome (XXY) x (XXY)

Match the scientific discoveries in List I with the scientists in List II and select the correct answer by using the codes given below the lists.
List I
(A) DNA structure
(B) A B O Blood groups
(C) Jumping genes
(D) Regulatory genes Codes
List II
(1) Jacob and Monod
(2) Barbara McClintock
(3)Watson and Crick
(4) Landsteiner

Sex-linked genes are carried by.

How many alleles in a given gene are possible ?

Linked genes are present in.

Genes are made of.

Match List I with List II and select the correct answer using the codes given below the lists.
List I
(A) Cell theory
(B) Theory of natural selection
(C) One gene one enzyme hypothesis
(D) Chemiosmotic hypothesis
List II
(1) P Mitchell
(2) Beadle and Tatum
(3) Schleiden and Schwann
(4) Darwin

Which is the correct chronological order ?
(A) Mendel,s laws of inheritance
(B) Darwin,s theory of evolution
(C) Blood circulation by Harvey
(D) De Vries theory of mutation

Which of the following is normal human (male chromosomal constitution )?

Match the following.
List I
(A) Hargobind Khorana
(B) Watson and Crick
(C) Gregor Mendel
(D) Landsteiner
List II
(1) Laws of Heredity
(2) Blood groups
(3) Working model of synthetic gene
(4) Double helix DNA

The molecules responsible for storing the genetic code are.

During protein synthesis a particular kind of RNA acts as an intermediary between DNA and ribosomes.This is.

A gene which fails to express in the presence of non-allelic genes is.

Mutation may cause.

Rate of mutation in plants can be increased by.

Rate of mutation can be increased by.

Mutation could be created by X-rays This was found by.

Mutation cannot be caused by one of the following.

Mutation is.

Which one of the following approaches come under the category of biotechnology ?

Which of the following fungi has been extensively used for genetical studies ?

Successful fusion of somatic cells from man and mouse was first demonstrated by.

If a mouse over eight times of its normal size has been produced by introducing human growth hormone gene, the technique involved is called.

Genetic engineering is the most recent and potent technique developed to improve plants animals. This means.

In genetic engineering,a DNA segment of interest is joined to a small but complete DNA molecule that is capable of replicating itself This DNA molecule is referred to as.

The new techniques developed during the last few years have made it possible to produce an intergeneric hybrid between potato and tomato, the pomato through.

The specialized cell types having extremely long lives extremely long lives with their inability to undergo mitosis and which get replaced following an injury are.
1 Skeletal muscle cells
2 Cardiac muscles cells
3 Lymphocytes
4 Nerve cells

Body cells infected with virus produce a protein called.

Which fungus was of great use in finding out genetic principles ?

Mendel chose for his experiments the plant.

When White flowered

F₁

plants were crossed to pure red-flowered plants the progeny had all plants which were.

Which one of the following Laws of Mendel could be arrived at only by a dihybrid cross.

What makes Mendel,s contribution so impressive is that he described the basic patterns of inheritance before the mechanism for inheritance was even.

The genotypic ratio in the

F₂

generation in a monohybrid cross will be.

When tall Red plant is crossed with dwarf white plant, the

F₂

generation tall red and dwarf white will occur in the ratio of.

In all of the Mendel,s experiments the alleles causing a trait were.

A test cross is one which is made to determine the.

An inherited characteristic which does not appear in one generation but can appear in the next is called.

When two organisms are crossed with a view to study only one of their characters it is called.

Normal monohybrid cross yields in the

F₂

generation, a ratio of 3:1 In some cases the ratio is found to be 2:1 Itis due to.

Two tall plants,each being a hybrid and carrying a recessive factor for dwarfness are crossed What proportion of thier offspring will be dwarf?

Which one of the following represents a true heterozygous arrangement of genes ?

What is atavism ?

Test cross is a cross between.

An exception to Mendel,s Laws is.

A lot of information about linkage in genetics has been obtained by researches on the organism.

Some human disease sare genetically controlled was first established by.

Which of the following human disease/s is/are hereditary in nature ?

Haemophilia is a hereditary disease carried by.

Which of the following human disease/s is/are controlled by heredity?

A white woman marries a black man.They have four children-2 sons and 2 daughters What proportion of these children is likely to be black ?

A normal couple has five children ,two of whom suffer from a somewhat uncommon genetic disorder that has, however appeared occasionally in this familial line.What kind of gene is involved in this case?

A colour blind person commonly has difficulty in seeing.

Sons of a colour blind woman are always colour blind but not the daughters This suggests that.

A male child is born to parents only when.

A colur blind man is married to a normal visioned woman whose parents also had normal vision What proportion of their Children is likely to be colour blind?

If a boy,s father has haemophilia and his mother has one gene for it,what is the chance that the boy will inherit the disease ?

Which of the following statements is true?

The International Centre for Genetic Engineering and Biotechnology established by the United Nation Organizations (UNO) is located at.

In which one of the following is sex determined by environment ?