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Class 10 Science
Heredity And Evolution
Quiz 1
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In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are
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(i) and (ii)
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(iii) only
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(iii) and (iv)
0%
(ii) and (iv)
Explanation
(iii) and (iv)
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
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round and yellow
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round and green
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wrinkled and green
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wrinkled and yellow
Explanation
round and yellow
Human teeth and elephant’s tusk are
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Analogous organs
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Vestigeal organs
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Homologous organs
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Rudimentary organs
Explanation
Homologous organs
Independent inheritance of two separate traits, shape and colour of seeds in Mendel’s cross on pea plants resulted in a observable ratio of:
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3 : 1
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9 : 3 : 3 : 1
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1 : 1
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9 : 4 : 2 : 1
Explanation
9 : 3 : 3 : 1
Which of these is not a vestigial organ in human beings?
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Appendix
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Wisdom tooth
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Nictitating membrane
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Gall bladder
Explanation
Gall bladder
Evolution of wild cabbage is an example of:
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Artificial selection
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Natural selection
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Mutation
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Genetic drift
Explanation
Artificial selection
The modern day Human species has evolved from its earliest ancestors who lived in:
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Asia
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Australia
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Africa
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China
Explanation
Africa
Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be
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double fertilisation
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self pollination
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cross fertilisation
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no fertilisation
Explanation
self pollination
A zygote which has an X-chromosome inherited from the father will develop into a
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boy
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girl
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X- chromosome does not determine the sex of a child
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either boy or girl
Explanation
girl
New species may be formed if
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(i) and (ii)
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(i) and (iii)
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(ii), (iii) and (iv)
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(i), (ii) and (iii)
Explanation
(i) and (ii)
Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F
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(i) and (ii)
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(i) and (iv)
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(ii) and (iii)
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(i) and (iii)
Explanation
(i) and (iv)
A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures?
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Carrot and potato
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Carrot and tomato
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Radish and carrot
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Radish and potato
Explanation
Radish and carrot
If the fossil of an organism is found in the deeper layers of Earth, then we can predict that
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the extinction of organism has occurred recently
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the extinction of organism has occurred thousands of years ago
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the fossil position in the layers of Earth is not related to its time of extinction
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time of extinction cannot be determined
Explanation
the extinction of organism has occurred thousands of years ago
A trait in an organism is influenced by
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paternal DNA only
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maternal DNA only
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both maternal and paternal DNA
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neither by paternal nor by maternal DNA
Explanation
both maternal and paternal DNA
Select the group which shares maximum number of common characters.
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two individuals of a species
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two species of a genus
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two genera of a family
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two genera of two families
Explanation
two individuals of a species
According to the evolutionary theory, formation of a new species is generally due to
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sudden creation by nature
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accumulation of variations over several generations
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clones formed during asexual reproduction
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movement of individuals from one habitat to another
Explanation
accumulation of variations over several generations
In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F
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1 : 3
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3 : 1
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1 : 1
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2 : 1
Explanation
1 : 1
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
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reptiles have evolved from birds
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there is no evolutionary connection between reptiles and birds
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feathers are homologous structures in both the organisms
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birds have evolved from reptiles
Explanation
birds have evolved from reptiles
In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F2 is
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1 :1
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1 :2
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3 :1
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1 : 3
A gamete contains
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Two alleles of a gene
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One alleles of a gene
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All alleles of a gene
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None of the above
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