The inheritance of characters from parents to offspring is

The tendency of offspring to differ from their parents is called

Mendel’s hybridisation experimental material was

Which one from those given below is the period of Mendel’s hybridisation experiments?

Mendel investigated characters in garden pea plant manifested in two traits which were

A true breeding line is characterised by the presence of

How many pairs of true breeding varieties were selected by Mendel for his experiment on pea plant?

Out of 7 contrasting trait pairs selected by Mendel, how many traits were dominant and recessive?

Among the following characters, which one was not considered by Mendel in his experiments on pea?

Which is correct about traits choosen by Mendel for his experiment on pea plant?

What contributed to Mendel’s success?

I. Selection of pureline pea varieties.

II. Knowledge of history.

III. Selecting one character at a time.

IV. Statistical analysis and mathematicallogic.

Choose the correct option

The first hybrid progeny obtained by Mendel were called

F1 -progeny of a cross between pure tall and dwarf plant is always

According to Mendel’s observation, which generation of progeny always represents the phenotype of the dominant parent?

The Mendel crossed true breeding tall and dwarf plant varieties in his experiment. Tallness was the dominant character and dwarfness was recessive. The recessive character appeared in

How did Mendel obtained recessive (dwarf) character in F2 -generation?

The proportion of plants that were dwarf and tall, respectively in F2 -generation of Mendel’s experiment was

Mendel crossed tall and dwarf plants. In F2 -generation both the tall and dwarf plants were produced. This shows

During his experiments, Mendel used the term factor for

Genes which codes for a pair of contrasting characters are

Choose the incorrect match.

Number of gametes produced by a homozygous and a heterozygous individuals of genotype AA and Aa, respectively are

A cross in which parents differ in a single pair of contrasting character is called

The phenotypic ratio of a monohybrid cross in F2 -generation is

The genotypic ratio of a monohybrid cross in F2 -generation is

F2 -generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of

If the male plant has the genotype TT and the female plant has the genotype tt then they contribute pollen and egg, respectively with

Graphical representation to calculate the probability of all possible genotype of an offspring in genetic cross is called

Test cross involves a cross between

Mendel performed test cross to know the

When alleles of two contrasting characters are present together and one of the character expresses itself during the cross while the other remains hidden gives the

The allele which expresses itself in both homozygous and heterozygous condition is called

3:1 ratio in F2 -generation is explained by

The law of dominance is applicable in inheritance of

Mendel’s principle of segregation means that the germ cells always receive

The law based on fact that the characters do not show any blending and both the characters are recovered as such in F2 -generation although one character was absent in F1 -progeny, is

The types of gametes formed by the genotype RrYy are

In law of independent assortment how many factors are involved (for a dihybrid cross)

In Mendel’s experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr) and yellow colour (YY) was dominant over green colour (yy). What are the expected phenotypes in the F1 -generation of the cross RRYY × rryy?

In cross between pure breeding pea plants having yellow round (YYRR) and green wrinkled (yyrr) seeds, find out the total seeds (plants) having yellow colour in F2 -generation.

In a cross between plants having yellow round (YYRR) and green wrinkled (yyrr) seeds, what will be the ratio between seeds having yellow and green seed colour?

Total number of round seed in the F2 -generation of a cross between plants having pure yellow round and pure green wrinkled seeds is

Ratio observed in dihybrid cross (phenotypically)

The number of different genotypes observed in the F2 -generation of a dihybrid cross are

Mendel’s result on inheritance of characters were rediscovered by

The literal meaning of chromosome is

The concept of chromosome movement during meiosis to explain Mendel’s laws was used by

The chromosomes as well as genes occur in pair and the two alleles of a gene pair are located on

Who proposed the chromosomal theory of inheritance?

Experimental evidences of chromosomal theory of inheritance was given by

Morgan’s experimental organism was

Both chromosome and gene (Mendelian factors) whether dominant or recessive are transmitted from generation to generation in

Choose the incorrect pairing among the following.

Linked genes that were observed by Morgan were present on

Strength of the linkage between the two genes is

In Morgan’s experiment, white and yellow genes were linked tightly, while white and miniature wing were loosely linked. The per cent recombination shown by these genes were

In a test cross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant type offspring. This indicates

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by

What map unit (centi Morgan) is adopted in the construction of genetic maps?

Choose the incorrect pair with respect to sex determination in different organisms.

In XX and XY type of sex-determination

Male heterogamety is seen in

Choose the incorrect pair amongst the following

The chromosomal denotation for heterogametic female and homogametic males are

The number of chromosomes in females and males honeybees are

The unfertilised eggs in honeybees develop into

In honeybees, male and female gametes are produced through

Mutation is a phenomena which results in alteration in sequences of

Mutation may result in

Chromosomal abberation is commonly found in the

Point mutation arises due to the change in

If there are four different types of nitrogenous bases (A, T, G and C) then how many different types of transitions and transversion are possible?

Sickle-cell anaemia is a classical example of

Frame-shift mutation arises due to

Mutagens are

Analysis of traits of several generation of a family in the form of diagram is called

Pedigree analysis is very important in human beings because

Colour blindness in humans

A woman has an X-linked condition on one of her X-chromosomes. This chromosome can be inherited by

A normal-visioned man whose father was colourblind, marries a woman whose father was also colourblind. They have their first child as a daughter. What are the chances that this child would be colourblind?

A man whose father was colourblind marries a woman, who had a colourblind mother and normal father. What percentage of male children of this couple will be colourblind ?

A normal woman whose father was colourblind, marries a normal man. What kinds of children can be expected and in what proportion ?

Which of the following most appropriately describes haemophilia?

In haemophilia, the affected protein is a part of a cascade of protein which is involved in the

In sickle-cell anaemia,

In individual suffering from phenylketonuria,

Thalassemia in humans

α-thalassemia in humans is controlled by

β-thalassemia in humans is controlled by

Failure of segregation of chromatid during cell division cycle results in the gain or loss of chromosome which as called

A cell telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in

Non-disjunction in meiosis results in

A disease caused by an autosomal primary non-disjunction is

Karyotype of Down’s syndrome has how many chromosomes?

I. Short statured body with small round head. II. Furrowed tongue and partially opened mouth. III. Palm is broad with characteristic palm crease. IV. Slow physical, psycomotor and mental development. These are the characters of

Choose the correct pair.

What is the genetic disorder in which an individual has an overall masculine development gynaecomastia and is sterile?

Klinefelter’s syndrome results from

In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?

Female suffering from Turner’s syndrome possess

Which of the following are chromosomal disorders.

I. Colour blindness

II. Down’s syndrome

III. Phenylketonuria

IV. Turner’s syndrome

V. Thalassaemia