Heredity Quiz

Q1: The sequence of gradual changes which takes place in the primitive organisms over millions of years in which new species are produced is known as

• Evolution
• Heredity
• Generation
• Inheritance

Q2: Human teeth and elephant’s tusk are

• Analogous organs
• Vestigeal organs
• Homologous organs
• Rudimentary organs

Q3: Heredity And Evolution Class 10 MCQ Question 1. Process of selecting individuals with desired characters by man is called

• Hybridization
• Reproduction
• Artificial selection
• Natural selection

Q4: If a normal cell of human body contains 46 pairs of chromosomes then the numbers of chromosomes in a sex cell of a human being is most likely to be:

• 60
• 23
• 22
• 40

Q5: Independent inheritance of two separate traits, shape and colour of seeds in Mendel’s cross on pea plants resulted in a observable ratio of:

• 3 : 1
• 9 : 3 : 3 : 1
• 1 : 1
• 9 : 4 : 2 : 1

Q6: Which one of the following pairs are homologous organs?

• Forelimbs of a bird and wings of a bat.
• Wings of a bird and wings of a butterfly.
• Pectoral fins of a fish and forelimbs of a horse.
• Wings of a bat and wings of a cockroach.

Q7: In the human blood grouping, the four basic blood types are type A, type B, type AB, and type O. They are:

• Simple dominant and recessive traits
• Co-dominant traits
• Recessive traits
• Inherited traits

Q8: Which of these is not a vestigial organ in human beings?

• Appendix
• Wisdom tooth
• Nictitating membrane
• Gall bladder

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

• Mendel
• Darwin
• Lamarck
• Weismann

Q10: A pregnant woman has an equal chance of her baby being blood group A or blood group AB. Which one of the following shows the possible genotypes of the woman and the father of her child?

• IA IA and IB IO
• IA IB and IB IO
• IA IO and IB IO
• IO IB and IA IO

Q11: Evolution of wild cabbage is an example of:

• Artificial selection
• Natural selection
• Mutation
• Genetic drift

Q12: A cross between a tall pea-plant (TT) and a short pea-plant (tt) resulted in progenies that were all tall plants because

• tallness is the recessive trait.
• shortness is the dominant trait.
• height of pea-plant is not governed by gene T or t.
• tallness is the dominant trait.

Q13: What will be the number of chromosomes present in each gamete produced by the plants if the palisade cells of a species of plant contain 28 chromosomes in all?

• 56
• 28
• 14
• 4

Q14: The modern day Human species has evolved from its earliest ancestors who lived in:

• Asia
• Australia
• Africa
• China

Q15: The number of pairs of sex chromosomes in the zygote of a human being is

• 2
• 3
• 1
• 4

Q16: A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants as:

• Tallness is the dominant trait
• Shortness is the dominant trait
• Tallness is the recessive trait
• Height of plant is not governed by gene t or t

Q17: Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be

• double fertilisation
• self pollination
• cross-fertilisation
• no fertilisation

Q18: A zygote that has an X-chromosome inherited from the father will develop into a

• girl
• boy
• either boy or girl
• X-chromosome does not influence the sex of a child.

Q19: In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2 generation will be:

• 1 : 3
• 3 : 1
• 1 : 1
• 2 : 1

Q20: Which of the following statement is incorrect?

• For every hormone there is a gene.
• For every protein there is a gene.
• For production of every enzyme there is a gene.
• For every molecule of fat there is a gene

Q21: A man with blood group A marries a woman having blood group O. What will be the blood group of the child?

• O only
• A only
• AB
• Equal chance of acquiring blood group A or blood group O.

Q22: In human males, all the chromosomes are paired perfectly except one. These unpaired chromosomes are: i. Large chromosome ii. Small chromosome iii. Y chromosome iv. X chromosome

• (i) and (ii)
• (iii) and (ii)
• (iii) and (iv)
• (ii) and (iv)

Q23: If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant (rr YY), the seeds produced in F1 generation are

• round and yellow
• round and green
• wrinkled and green
• wrinkled and yellow

Q24: What does the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like?

• All are tall with round seeds.
• All are short with round seeds.
• All are tall with wrinkled seeds.
• All are short with wrinkled seeds.

Q25: Which of the following determines the sex of a child?

• The length of the mother’s pregnancy
• The length of time between ovulation and copulation
• The presence of an X chromosome in an ovum
• The presence of a Y chromosome in a sperm

Q26: In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are i. large chromosome ii. small chromosome iii. Y-chromosome iv. X-chromosome

• (i) and (ii)
• (iii) only
• (iii) and (iv)
• (ii) and (iv)

Q27: If a round, green seeded pea-plant (RRyy) is crossed with a wrinkled yellow seeded pea- plant (rrYY), the seeds produced in F1 generation are

• round and green
• round and yellow
• wrinkled and green
• wrinkled and yellow

Q28: Which is the one characteristic of the parents that can be inherited by their children?

• Deep scar on chin
• Snub nose
• Technique of swimming
• Cut nose

Q29: New species may be formed if i. DNA undergoes significant changes in germ cells ii. chromosome number changes in the gamete iii. there is no change in the genetic material iv. mating does not take place

• (i) and (ii)
• (i) and (iii)
• (ii), (iii) and (iv)
• (i), (ii) and (iii)

Q30: The human species has genetic roots in

• Australia
• Africa
• America
• Indonesia

Q31: What could be the reason for the fossil of an organism to be found in the deeper layers of the earth?

• The extinction of organism has occurred few years back
• The extinction of organism has occurred thousands of years ago
• The position of fossil in the layers of earth is not related to its time of extinction
• Time of extinction cannot be determined.

Q32: Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination of characters. Choose the new combination from the following: i. Round, yellow ii. Round, green iii. Wrinkled, yellow iv. Wrinkled, green

• (i) and (ii)
• (i) and (iv)
• (ii) and (iii)
• (i) and (iii)

Q33: Which of the following is the ancestor of ‘Broccoli’?

• Cabbage
• Cauliflower
• Wild cabbage
• Kale

Q34: The organs present in two organisms indicate that they are derived from the same ancestor are:

• Analogous Organs
• Respiratory Organs
• Sense organs
• Homologous Organs

Q35: A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures?

• Carrot and potato
• Carrot and tomato
• Radish and carrot
• Radish and potato

Q36: The process of evolution of a species whereby characteristics which help individual organisms to survive and reproduce are passed on to their offspring and those characteristics which do not help are not passed on is called

• Artificial selection
• Speciation
• Hybridization
• Natural selection

Q37: Which of the following pair of organ is not homologous?

• Forelimbs in humans and lizard
• Forelimbs in lizard and frog
• Wings in butterfly and bat
• None of these

Q38: If the fossil of an organism is found in the deeper layers of Earth, then we can predict that

• the extinction of organism has occurred recently
• the extinction of organism has occurred thousands of years ago
• the fossil position in the layers of Earth is not related to its time of extinction
• time of extinction cannot be determined

Q39: Identify the two organisms which are now extinct and are studied from their fossils.

• white tiger and sparrow
• dinosaur and fish (Knightian)
• ammonite and white tiger
• trilobite and white tiger

Q40: Two pink colored flowers on crossing resulted in 1 and 2 pink and 1 white flower progeny. The nature of cross will be :

• Double fertilization
• Self pollination
• Cross pollination
• No fertilization

Q41: A trait in an organism is influenced by

• paternal DNA only
• maternal DNA only
• both maternal and paternal DNA
• neither by paternal nor by maternal DNA

Q42: Pure-bred pea plant A is crossed with purebred pea plant B. It is found that the plants which look like A do not appear in Fj generation but re-emerge in F2 generation. Which of the plants A and B are tall and dwarf?

• A are tall and B are dwarf.
• A are tall and B are also tall.
• A are dwarf and B are also dwarf
• A are dwarf and B are tall

Q43: Select the incorrect statement :

• Frequency of certain genes in a population change over several generations resulting in evolution
• Reduction in weight of organism due to starvation is genetically controlled
• Low weight parents can have heavy weight progeny
• Traits which are not inherited over generation do not cause evolution

Q44: Select the group which shares maximum number of common characters.

• two individuals of a species
• two species of a genus
• two genera of a family
• two genera of two families

Q45: A cross between two individuals results in a ratio of 9 : 3 : 3 :1 for four possible phenotypes of progeny. This is an example of a

• Monohybrid cross
• Dihybrid cross
• Test cross
• F1 generation

Q46: The maleness of a child is determined by ___.

• X chromosome in zygote
• Y chromosome in zygote
• The cytoplasm of germ cells which determines the sex
• Sex is determined by chance

Q47: Select the statements that describe characteristics of genes i. genes are specific sequence of bases in a DNA molecule ii. a gene does not code for proteins iii. in individuals of a given species, a specific gene is located on a particular chromosome iv. each chromosome has only one gene

• (i) and (ii)
• (i) and (iii)
• (i) and (iv)
• (ii) and (iv)

Q48: Which of the following characters can be acquired but not inherited?

• Colour of skin
• Size of body
• Colour of eyes
• Texture of hair

Q49: Those organs which have different basic structure but have similar appearance and perform similar functions are called

• Analogous organs
• Homologous organs
• Vestigial organs
• None of these

Q50: The exchange in genetic material takes place in _____.

• vegetative propagation
• Asexual reproduction
• sexual reproduction
• budding

Q51: ___is used for studying human evolution .

• Excavating
• Time dating
• Determining DNA sequence
• All

Q52: The preserved traces of living organisms are called ________.

• Fossils
• Species
• Non living materials
• None

Q53: 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

• reptiles have evolved from birds
• there is no evolutionary connection between reptiles and birds
• feathers are homologous structures in both the organisms
• birds have evolved from reptiles

Q54: The remaps (or impressions) of dead animals or plant that lived in the remote past are known as

• extinct species
• fossils
• naturally selected species
• none of the above

Q55: Which of the following is an example of genetic variation?

• One person has a scar, but his friend does not.
• One person is older than another.
• Reeta eats meat, but her sister Geeta is a vegetarian.
• Two children have different eye colors.

Q56: What is the difference between genetic drift and change due to natural selection?

• Genetic drift does not require the presence of variation.
• Genetic drift never occurs in nature, natural selection does.
• Genetic drift does not involve competition between members of a species.
• There is no difference

Q57: Wild cabbage has evolved into new varieties like cabbage, broccoli and cauliflower by

• genetic drift
• natural selection
• reproductive isolation
• artificial selection

Q58: DNA is the information source for making ___in cells .

• fats
• vitamins
• proteins
• all