Heredity Quiz

Question 1

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

Accepted Answer

Evolution

Answer

Heredity

Answer

Generation

Answer

Inheritance

Question 2

Human teeth and elephant’s tusk are

Accepted Answer

Homologous organs

Answer

Analogous organs

Answer

Vestigeal organs

Answer

Rudimentary organs

Question 3

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

Accepted Answer

Artificial selection

Answer

Hybridization

Answer

Reproduction

Answer

Natural selection

Question 4

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:

Accepted Answer

23

Answer

60

Answer

22

Answer

40

Question 5

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

Accepted Answer

9 : 3 : 3 : 1

Answer

3 : 1

Answer

1 : 1

Answer

9 : 4 : 2 : 1

Question 6

Which one of the following pairs are homologous organs?

Accepted Answer

Forelimbs of a bird and wings of a bat.

Answer

Wings of a bird and wings of a butterfly.

Answer

Pectoral fins of a fish and forelimbs of a horse.

Answer

Wings of a bat and wings of a cockroach.

Question 7

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

Accepted Answer

Co-dominant traits

Answer

Simple dominant and recessive traits

Answer

Recessive traits

Answer

Inherited traits

Question 8

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

Accepted Answer

Gall bladder

Answer

Appendix

Answer

Wisdom tooth

Answer

Nictitating membrane

Question 9

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

Accepted Answer

Darwin

Answer

Mendel

Answer

Lamarck

Answer

Weismann

Question 10

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?

Accepted Answer

IA IA and IB IO

Answer

IA IB and IB IO

Answer

IA IO and IB IO

Answer

IO IB and IA IO

Question 11

Evolution of wild cabbage is an example of:

Accepted Answer

Artificial selection

Answer

Natural selection

Answer

Mutation

Answer

Genetic drift

Question 12

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

Accepted Answer

shortness is the dominant trait.

Answer

tallness is the recessive trait.

Answer

height of pea-plant is not governed by gene T or t.

Answer

tallness is the dominant trait.

Question 13

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?

Accepted Answer

14

Answer

56

Answer

28

Answer

4

Question 14

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

Accepted Answer

Africa

Answer

Asia

Answer

Australia

Answer

China

Question 15

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

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 16

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

Accepted Answer

Tallness is the dominant trait

Answer

Shortness is the dominant trait

Answer

Tallness is the recessive trait

Answer

Height of plant is not governed by gene t or t

Question 17

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

Accepted Answer

self pollination

Answer

double fertilisation

Answer

cross-fertilisation

Answer

no fertilisation

Question 18

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

Accepted Answer

girl

Answer

boy

Answer

either boy or girl

Answer

X-chromosome does not influence the sex of a child.

Question 19

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:

Accepted Answer

1 : 1

Answer

1 : 3

Answer

3 : 1

Answer

2 : 1

Question 20

Which of the following statement is incorrect?

Accepted Answer

For every molecule of fat there is a gene

Answer

For every hormone there is a gene.

Answer

For every protein there is a gene.

Answer

For production of every enzyme there is a gene.

Question 21

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

Accepted Answer

Equal chance of acquiring blood group A or blood group O.

Answer

O only

Answer

A only

Answer

AB

Question 22

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

Accepted Answer

(iii) and (iv)

Answer

(i) and (ii)

Answer

(iii) and (ii)

Answer

(ii) and (iv)

Question 23

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

Accepted Answer

round and yellow

Answer

round and green

Answer

wrinkled and green

Answer

wrinkled and yellow

Question 24

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

Accepted Answer

All are tall with round seeds.

Answer

All are short with round seeds.

Answer

All are tall with wrinkled seeds.

Answer

All are short with wrinkled seeds.

Question 25

Which of the following determines the sex of a child?

Accepted Answer

The presence of a Y chromosome in a sperm

Answer

The length of the mother’s pregnancy

Answer

The length of time between ovulation and copulation

Answer

The presence of an X chromosome in an ovum

Question 26

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

Accepted Answer

(iii) and (iv)

Answer

(i) and (ii)

Answer

(iii) only

Answer

(ii) and (iv)

Question 27

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

Accepted Answer

round and yellow

Answer

round and green

Answer

wrinkled and green

Answer

wrinkled and yellow

Question 28

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

Accepted Answer

Snub nose

Answer

Deep scar on chin

Answer

Technique of swimming

Answer

Cut nose

Question 29

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

Accepted Answer

(i) and (ii)

Answer

(i) and (iii)

Answer

(ii), (iii) and (iv)

Answer

(i), (ii) and (iii)

Question 30

The human species has genetic roots in

Accepted Answer

Africa

Answer

Australia

Answer

America

Answer

Indonesia

Question 31

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

Accepted Answer

The extinction of organism has occurred thousands of years ago

Answer

The extinction of organism has occurred few years back

Answer

The position of fossil in the layers of earth is not related to its time of extinction

Answer

Time of extinction cannot be determined.

Question 32

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

Accepted Answer

(i) and (iv)

Answer

(i) and (ii)

Answer

(ii) and (iii)

Answer

(i) and (iii)

Question 33

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

Accepted Answer

Wild cabbage

Answer

Cabbage

Answer

Cauliflower

Answer

Kale

Question 34

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

Accepted Answer

Homologous Organs

Answer

Analogous Organs

Answer

Respiratory Organs

Answer

Sense organs

Question 35

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

Accepted Answer

Radish and carrot

Answer

Carrot and potato

Answer

Carrot and tomato

Answer

Radish and potato

Question 36

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

Accepted Answer

Natural selection

Answer

Artificial selection

Answer

Speciation

Answer

Hybridization

Question 37

Which of the following pair of organ is not homologous?

Accepted Answer

Wings in butterfly and bat

Answer

Forelimbs in humans and lizard

Answer

Forelimbs in lizard and frog

Answer

None of these

Question 38

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

Accepted Answer

the extinction of organism has occurred thousands of years ago

Answer

the extinction of organism has occurred recently

Answer

the fossil position in the layers of Earth is not related to its time of extinction

Answer

time of extinction cannot be determined

Question 39

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

Accepted Answer

dinosaur and fish (Knightian)

Answer

white tiger and sparrow

Answer

ammonite and white tiger

Answer

trilobite and white tiger

Question 40

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

Accepted Answer

Cross pollination

Answer

Double fertilization

Answer

Self pollination

Answer

No fertilization

Question 41

A trait in an organism is influenced by

Accepted Answer

both maternal and paternal DNA

Answer

paternal DNA only

Answer

maternal DNA only

Answer

neither by paternal nor by maternal DNA

Question 42

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?

Accepted Answer

A are dwarf and B are tall

Answer

A are tall and B are dwarf.

Answer

A are tall and B are also tall.

Answer

A are dwarf and B are also dwarf

Question 43

Select the incorrect statement :

Accepted Answer

Reduction in weight of organism due to starvation is genetically controlled

Answer

Frequency of certain genes in a population change over several generations resulting in evolution

Answer

Low weight parents can have heavy weight progeny

Answer

Traits which are not inherited over generation do not cause evolution

Question 44

Select the group which shares maximum number of common characters.

Accepted Answer

two individuals of a species

Answer

two species of a genus

Answer

two genera of a family

Answer

two genera of two families

Question 45

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

Accepted Answer

Dihybrid cross

Answer

Monohybrid cross

Answer

Test cross

Answer

F1 generation

Question 46

The maleness of a child is determined by ___.

Accepted Answer

Y chromosome in zygote

Answer

X chromosome in zygote

Answer

The cytoplasm of germ cells which determines the sex

Answer

Sex is determined by chance

Question 47

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

Accepted Answer

(i) and (iii)

Answer

(i) and (ii)

Answer

(i) and (iv)

Answer

(ii) and (iv)

Question 48

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

Accepted Answer

Size of body

Answer

Colour of skin

Answer

Colour of eyes

Answer

Texture of hair

Question 49

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

Accepted Answer

Analogous organs

Answer

Homologous organs

Answer

Vestigial organs

Answer

None of these

Question 50

The exchange in genetic material takes place in _____.

Accepted Answer

sexual reproduction

Answer

vegetative propagation

Answer

Asexual reproduction

Answer

budding

Question 51

___is used for studying human evolution .

Accepted Answer

All

Answer

Excavating

Answer

Time dating

Answer

Determining DNA sequence

Question 52

The preserved traces of living organisms are called ________.

Accepted Answer

Fossils

Answer

Species

Answer

Non living materials

Answer

None

Question 53

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

Accepted Answer

birds have evolved from reptiles

Answer

reptiles have evolved from birds

Answer

there is no evolutionary connection between reptiles and birds

Answer

feathers are homologous structures in both the organisms

Question 54

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

Accepted Answer

fossils

Answer

extinct species

Answer

naturally selected species

Answer

none of the above

Question 55

Which of the following is an example of genetic variation?

Accepted Answer

Two children have different eye colors.

Answer

One person has a scar, but his friend does not.

Answer

One person is older than another.

Answer

Reeta eats meat, but her sister Geeta is a vegetarian.

Question 56

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

Accepted Answer

Genetic drift does not involve competition between members of a species.

Answer

Genetic drift does not require the presence of variation.

Answer

Genetic drift never occurs in nature, natural selection does.

Answer

There is no difference

Question 57

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

Accepted Answer

artificial selection

Answer

genetic drift

Answer

natural selection

Answer

reproductive isolation

Question 58

DNA is the information source for making ___in cells .

Accepted Answer

proteins

Answer

fats

Answer

vitamins

Answer

all

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