Chapter 9 Heredity And Evolution | 10th Science English Medium MCQ Question and Answers | SSLC Science MCQ |
Chapter
9 Heredity and Evolution
Multiple Choice Questions:
1.
Process of selecting individuals with desired characters by man is called
(a)
Hybridization
(b)
Reproduction
(c)
Artificial selection
(d)
Natural selection
Answer: (c) Artificial selection
2.
Which one of the following pairs are homologous organs?
(a)
Forelimbs of a bird and wings of a bat.
(b)
Wings of a bird and wings of a butterfly.
(c)
Pectoral fins of a fish and forelimbs of a horse.
(d)
Wings of a bat and wings of a cockroach.
Answer: (a) Forelimbs of a bird and wings of a bat.
3.
The theory of evolution of species by natural selection was given by
(a)
Mendel
(b)
Darwin
(c)
Lamarck
(d)
Weismann
Answer: (b) Darwin
4.
A cross between a tall pea-plant (TT) and a short pea-plant (tt) resulted in
progenies that were all
tall
plants because
(a)
tallness is the recessive trait.
(b)
shortness is the dominant trait.
(c)
height of pea-plant is not governed by gene T or t.
(d)
tallness is the dominant trait.
Answer: (b) shortness is the dominant trait.
5.
The number of pairs of sex chromosomes in the zygote of a human being is
(a)
2
(b)
3
(c)
1
(d)
4
Answer:
(c) 1
6.
A zygote which has an X-chromosome inherited from the father will develop into
a
(a)
girl
(b)
boy
(c)
either boy or girl
(d)
X-chromosome does not influence the sex of a child.
Answer: (a) girl
7.
A man with blood group A marries a woman having blood group O. What will be the
blood group
of
the child?
(a)
O only
(b)
A only
(c)
AB
(d)
Equal chance of acquiring blood group A or blood group O.
Answer: (d) Equal chance of acquiring blood group A or blood group O.
8.
What does the progeny of a tall plant with round seeds and a short plant with wrinkled
seeds look like?
(a)
All are tall with round seeds.
(b)
All are short with round seeds.
(c)
All are tall with wrinkled seeds.
(d)
All are short with wrinkled seeds.
Answer: (a) All are tall with round seeds.
9.
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
(a)
round and green
(b)
round and yellow
(c)
wrinkled and green
(d)
wrinkled and yellow
Answer: (b) round and yellow
10.
The human species has genetic roots in
(a)
Australia
(b)
Africa
(c)
America
(d)
Indonesia
Answer: (b) Africa
11.
Which of the following is the ancestor of ‘Broccoli’?
(a)
Cabbage
(b)
Cauliflower
(c)
Wild cabbage
(d)
Kale
Answer: (c) Wild cabbage
12.
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
(a)
Artificial selection
(b)
Speciation
(c)
Hybridization
(d)
Natural selection
Answer: (d) Natural selection
13.
Identify the two organisms which are now extinct and are studied from their
fossils.
(a)
white tiger and sparrow
(b)
dinosaur and fish (Knightia)
(c)
ammonite and white tiger
(d)
trilobite and white tiger
Answer: (b) dinosaur and fish (Knightia)
14.
Which of the following decides the sex of the child?
(a)
male gamete, i.e., sperm
(b)
female gamete, i.e., ovum
(c)
both sperm and ovum
(d)
mother
Answer: (a) male gamete, i.e., sperm
15.
Pure-bred pea plant A is crossed with pure¬bred pea plant B. It is found that
the plants which look like A do
not appear in Fj gene¬ration but re-emerge in F2 generation. Which of the
plants A and B are tall and dwarf?
(a)
A are tall and B are dwarf.
(b)
A are tall and B are also tall.
(c)
A are dwarf and B are also dwarf
(d)
A are dwarf and B are tall
Answer:
(d) A are dwarf and B are tall
16.
In humans if gene B gives brown eyes and gene b gives blue eyes, what will be
the colour of eyes of the persons having combinations
(i)
Bb and (ii) BB?
(a)
(i) Blue and (ii) Brown
(b)
(i) Brown and (ii) Blue
(c)
(i) Brown and (ii) Brown
(d)
(i) Blue and (ii) Blue
Answer:
(c) (i) Brown and (ii) Brown
17.
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
(a)
Monohybrid cross
(b)
Dihybrid cross
(c)
Test cross
(d)
F1 generation
Answer:
(b) Dihybrid cross
18.
Which of the following characters can be acquired but not inherited?
(a)
Colour of skin
(b)
Size of body
(c)
Colour of eyes
(d)
Texture of hair
Answer:
(b) Size of body
19.
Those organs which have the same basic structure but different functions are
called
(a)
Vestigial organs
(b)
Analogous organs
(c)
Homologous organs
(d)
None of these
Answer:
(c) Homologous organs
20.
Those organs which have different basic structure but have similar appearance
and perform
similar
functions are called
(a)
Analogous organs
(b)
Homologous organs
(c)
Vestigial organs
(d)
None of these
Answer:
(a) Analogous organs
21.
The remaps (or impressions) of dead animals or plant? that lived in the remote
past are known as
(a)
extinct species
(b)
fossils
(c)
naturally selected species
(d)
none of the above
Answer: (b) fossils
22.
The process by which new species develop from the existing species is known as
(a)
Evolution
(b)
Natural selection
(c)
Artificial selection
(d)
Speciation
Answer: (d) Speciation
23.
Which of the following is an example of genetic variation?
(a)
One person has a scar, but his friend does not.
(b)
One person is older than another.
(c)
Reeta eats meat, but her sister Geeta is a vegetarian.
(d)
Two children have different eye colours.
Answer:
(d) Two children have different eye colours.
24.
Differences between organisms in a species are described as variation. Which of
the following
would
you describe as continuous variation?
(a)
Hair colour
(b)
Eye colour
(c)
Weight
(d)
Sex
Answer:
(c) Weight
25.
The more characteristics two species have in common :
(a)
More closely they are related and more recently they had a common ancestors.
(b)
More distantly they are related and more recently they have common ancestors.
(c)
More closely they are related and more distantly they have common ancestors.
(d)
More distantly they are related and more distantly they have common ancestors.
Answer:
(a) More closely they are related and more recently they had a common
ancestors.
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