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Heredity and Evolution Class 10 MCQs Questions with Answers
Question 1.
A Mendelian experiment consisted 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 suggests that the genetic make-up of the tall parent can be depicted as
(a) TTWW
(b) TTWW
(c) TtWW
(d) TtWw
Answer:
(c) TtWW
Question 2.
An example of homologous organs is:
(a) Our arm and a dog’s fore-leg
(b) our teeth and an elephant’s tusks
(c) potato and runners of grass
(d) all of the above
Answer:
(a) Our arm and a dog’s fore-leg
Question 3.
Which one is the nearest member of human in evolutionary history?
(a) Monkey
(b) Bat
(c) Rabbit
(d) Chimpanzee
Answer:
(d) Chimpanzee
Question 4.
A pure tall plant is crossed with a pure dwarf plant. What type of offspring will be produced in F, generation?
(a) pure tall
(b) pure dwarf
(c) hybrid tall
(d) pure tall and pure dwarf.
Answer:
(c) hybrid tall
Question 5.
Round and yellow seed colour is:
(a) incomplete dominance
(b) recessive
(c) hybrid
(d) dominant
Answer:
(d) dominant
Question 6.
Mendel performed his famous hybridization experiments on:
(a) garden pea
(b) Hibiscus
(c) rose
(d) cucurbita
Answer:
(a) garden pea
Question 7.
The pairs of characters used by Mendel during his experiments were:
(a) ten
(b) six
(c) seven
(d) two
Answer:
(c) seven
Question 8.
In a monohybrid cross, ratio between pure and hybrid plants is:
(a) 25 : 75
(b) 75 : 25
(c) 50 : 50
(d) 40 : 60
Answer:
(c) 50 : 50
Question 9.
Father of genetics is:
(a) Newton
(b) Mendel
(c) Khurana
(d) Darwin.
Answer:
(b) Mendel
Question 10.
When an individual is having both the alleles of a contrasting character, it is said to be:
(a) homozygous
(b) heterozygous
(c) dioecious
(d) monoecious.
Answer:
(b) heterozygous
Question 11.
Mendel’s work was rediscovered by:
(a) Charles Darwin
(b) T. H. Morgan
(c) K. Carrens, E. Tschermak and H. de Vries
(d) Bateson and Punnett.
Answer:
(c) K. Carrens, E. Tschermak and H. de Vries
Question 12.
All dissimilarities of characteristics between members of the same species are called:
(a) mutation
(b) variations
(c) heredity
(d) crossing over
Answer:
(b) variations
Question 13.
Cross between hybrid and one of the parents is called:
(a) back cross
(b) mono-hybrid cross
(c) dihybrid cross
(d) none of these
Answer:
(d) none of these
Question 14.
Which one of the following is hereditary matter?
(a) RNA
(b) DNA
(c) Ribosome
(d) Mitochondria
Answer:
(b) DNA
Question 15.
Which of the following genotype represents pure round seeds:
(a) tt
(b) Tt
(c) tT
(d) RR
Answer:
(c) tT
Question 16.
The pair having opposite characteristics is called:
(a) allelomorph
(b) dominant
(c) homozygous
(d) similar
Answer:
(a) allelomorph
Question 17.
Miller synthesized simple amino-acid from:
(a) methane, ammonia, oxygen, nitrogen
(b) hydrogen, methane, ammonia, water
(c) ammonia, methane, water, carbon-di-oxide
(d) hydrogen, oxygen, water, nitrogen
Answer:
(b) hydrogen, methane, ammonia, water
Question 18.
Sex chromosomes in man are:
(a) XY
(b) XX
(c) Y
(d) X
Answer:
(a) XY
Question 19.
Example of Homologous organs are:
(a) My hand and dog’s forearm
(b) My teeth and elephants teeth
(c) Potato and runner of grass
(d) All of these
Answer:
(d) All of these
Question 20.
Analogous organs show similarity in:
(a) size
(b) origin
(c) appearance
(d) function
Answer:
(d) function
Question 21.
Number of autosome pairs in man is:
(a) 22
(b) 23
(c) 1
(d) 46
Answer:
(a) 22
Question 22.
Which of the following is genotye of famle:
(a) xy
(b) xx
(c) xy
(d) All these
Answer:
(a) xy
Question 23.
Broccoli, Cauliflower, Cabbage etc. are produced by:
(a) Reproductive isolation
(b) Artificial selection
(c) Survival of the fittest
(d) Natural selection
Answer:
(b) Artificial selection
Question 24.
Unfertilized human ovum contains:
(a) one pair of X chromosome
(b) XY chromosome
(c) Y chromosome
(d) one X chromosome
Answer:
(d) one X chromosome
Question 25.
In most animals, sex is determined:
(a) at birth of a child
(b) when ovum is formed
(c) soon after fertilization
(d) when embryo is formed
Answer:
(d) when embryo is formed
Question 26.
Sex in human being is determined by:
(a) sex chromosomes of father
(b) sex chromosome of mother
(c) size of ovum
(d) size of sperm
Answer:
(a) sex chromosomes of father
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