Practice Test

Q1) Which of the following statement is incorrect? Show Answer

Q2) The maleness of a child is determined by Show Answer

Q3) A zygote which has X-chromosome inherited from the father will develop into a Show Answer

Q4) From the list given below, select the character which can be acquired but not inherited. Show Answer

Q5) Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be Show Answer

Q6) A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because Show Answer

Q7) The number of pair (s) of sex chromosomes in the zygote of humans is Show Answer

Q8) In evolutionary terms, we have more in common with Show Answer

Q9) The theory of evolution of species by natural selection was given by: Show Answer

Q10) The theory of inheritance of acquired characters was given by Show Answer

Q11) If the fossil of an organism is found in the deeper layers of earth, then we can predict that Show Answer

Q12) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): A geneticist crossed a pea plant having violet flowers with a pea plant having white flowers, he got all violet flowers in first generation.
Reason (R): White colour gene is not passed on to next generation. Show Answer

Q13) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion: Mendel chose a number of varieties of garden pea as plant material for his experiment.
Reason: Garden pea has well defined characters and is bisexual. Show Answer

Q14) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion: In humans, males play an important roles in determining the sex of the child.
Reason: Males have two X chromosomes. Show Answer

Q15) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): Learning a skill such as dance and music is an acquired trait.
Reason (R): Acquired traits develop in the life time of an individual and do not pass to the progeny. Show Answer

Q16) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): Traits like eye colour or height are inherited traits.
Reason (R): Inherited traits are not transferred from parents to young ones. Show Answer

Q17) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion: Fossils are remains of dead organism.
Reason: It is helpful in study of evolution. Show Answer

Q18) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion: Wings of butterfly and wings of bat are analogus organs.
Reason: Analogous organs have different origin and structural plan but same function. Show Answer

Q19) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion: Speciation is the process of formation of a new species from a pre-existing one.
Reason: Mutation plays a role in speciation. Show Answer

Q20) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion: Natural selection is the phenomenon by which the nature selects those species which possess survival advantage over the other species.
Reason: According to the theory of natural selection, there is struggle of existence existence within the species of a population for the environmental resources and their struggle leads to survival of certain organisms and elimination of the less competent species. Show Answer

Q21) The above cross is known as: Show Answer

Q22) The missing blank in the above cross is: Show Answer

Q23) A mendelian experiment consists of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggest that the genetic make-up of the tall parent cod depicted as Show Answer

Q24) A and B are ______ traits. Show Answer

Q25) A-D are ______ and C-B are _____ type of seeds. Show Answer

Q26) The above cross is known as Show Answer

Q27) The process through which characters pass from one generation to another is called Show Answer

Q28) Which of the following statements is not true with respect to variation? Show Answer

Q29) Free earlobes are ...(i)... traits and attached earlobes are ...(ii)... traits. Show Answer

Q30) A trait in an organism in influenced by Show Answer

Q31) Which amongst the listed tools was used to study the law of inheritance in pea plant by Gregor J Mendel? Show Answer

Q32) A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because Show Answer

Q33) The genotype of the height of an organism is written as Tt. What conclusion may be drawn? Show Answer

Q34) Choose the correct statement from the following.
I. Variation in plants are much lesser than human beings.
II. Each trait in child is influenced by only paternal DNA.
III. An individual having two different alleles for the same trait is called hybrid.
IV. Traits that are passed on from parents to their offspring are controlled by genes. Show Answer

Q35) Assertion: Dominant allele is an allele whose phenotype expresses even in the presence of another allele of that gene.
Reason: It is represented by a capital letter, e.g. T. Show Answer

Q36) Assertion: All the human female gemetes will have only X-chromosome.
Reason: Females are homogametic with two X-chromosomes. Show Answer

Q37) Assertion: The sex of a child will be determined by chromosome received from the father.
Reason: A human male has one X and one Y-chromosome. Show Answer

Q38) A cross between two individuals results in 9:3:3:1 for four possible phenotypes of progeny. This is an example of a Show Answer

Q39) Which of the following law is mainly explained by the given cross? Show Answer

Q40) Mendel took ...... Contrasting characteristics of pea plants. Show Answer

Q41) Which mendelian law states that inheritance of one character is always independent to the inheritance of other character within the same individuals? Show Answer

Q42) Round and yellow seed is Show Answer

Q43) The number of pair(s) of sex chromosomes in the zygote of humans is Show Answer

Q44) Choose the correctly matched pair. Show Answer

Q45) Assertion: Genes present in every cell of an organism control the traits of the organisms.
Reason: Gene is specific segment of DNA occupying specific position on chromosome. Show Answer

Q46) Assertion: Traits like tallness and dwarfness in pea plant are inherited independently.
Reason: When a homozygous tall pea plant is crossed with dwarf pea plant, medium sized pea plant is obtained in F1 generation. Show Answer

Q47) Assertion: In human females, all the chromosomes are perfectly paired except sex chromosomes.
Reason: X and Y are sex chromosomes in males. Show Answer

Q48) Which of the following is n example of genetic variation ? Show Answer

Q49) Difference between organism in a species are described as variation. Which of the following would you describe as continuous variation? Show Answer

Q50) The more characteristics two species have in common : Show Answer

Q51) Ton study the natural phenomenon of inheritance, Mendel selected the pea plants. Which of the following properties were suitable for their studies ?

(i) Plants would easily self pollinate or cross pollinate in nature.

(ii) Plants were easily grown in garden soil with a considerably shorter generation time.

(iii) Pea plants do not require the true-breeding for hybridization experiments.

(iv) Many parts of the plant such as pod, seed, flower, cotyledons showed distinct phenotypes. Show Answer

Q52) What is the difference between genetic drift and change due to natural selection? Show Answer

Q53) Which concept was not included in Charles Darwin's theory of Natural Selection ? Show Answer

Q54) Natural selection is called 'Survival of the fittest'. Which of the following statements best describes an organism? Show Answer

Q55) Human offspring's sex is determined Show Answer

Q56) Wild cabbage has evolved into new varieties like cabbage, broccoli and cauliflower by Show Answer

Q57) The fossil remains of Archaeopteryx is a connecting link between Show Answer

Q58) Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that Show Answer

Q59) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Variation is high in sexually reproducing organism compared to asexually reproducing organism.
Reason (R): Inaccuracies during DNA copying give rise to variation. Show Answer

Q60) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Acquired trait cannot be passed on from on generation to next generation.
Reason (R): In accuracy during DNA copying of acquired trait is minimum. Show Answer

Q61) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Human, frog and bird have a common ancestor.
Reason (R): Limbs of human, bird and frog are homologous. Show Answer

Q62) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as:
Assertion (A): Speciation is the reproductive isolation amongst once inter breeding population.
Reason (R): Genetic drift, natural selection and Severe DNA change can cause speciation. Show Answer

Q63) Acquired variations in somatic traits are not passed from generation to generation. Show Answer

Q64) Human height is a trait which shows variations. Show Answer

Q65) Variation decreases the chances of survival of an organism in a changing environment. Show Answer

Q66) Genes controls the development of inherited characteristics such as hair colour, skin colour,etc Show Answer

Q67) The theory of origin of life on earth proposed by Haldane was confirmed by Stanley L. Miller and Harold C Urey. Show Answer