CBSE Questions for Class 10 Biology Heredity And Evolution Quiz 3 - MCQExams.com

 Female humans have the following chromosomal condition:
  • 44 AA+XO
  • 44 AA+XX
  • 44 AA+XY
  • 44 AA+XXY
The chromosomes responsible for the sex determination are called: 
  • Autosomes
  • Allosomes
  • Multiple alleles
  • All of the above
Genetic identity of a human male is determined by:
  • Autosomes
  • Nucleolus
  • Sex chromosomes
  • Cell organelles

Assertion: We have lost all the direct evidence of the origin of life.

Reason: The people responsible to protect the evidence were not skilled.
  • If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  • If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  • If the assertion is true but the reason is false
  • If both the assertion and reason are false
  • If the assertion is false but reason is true
Structure present in a cell which is responsible for determination of the sex of a baby is:
  • Cytoplasm
  • Cell membrane
  • Nucleus
  • Chromosome
What are homologous structures?
  • Structures which have a common basic structure but perform different functions are called homologous structures.
  • Structures which do not have a common basic structure but perform different functions are called homologous structures.
  • Structures which have a common basic structure but perform same functions are called homologous structures.
  • Structures which have a different structure but perform different functions are called homologous structures.
A trait in an organism is influenced by ?
  • Paternal DNA only
  • Maternal DNA only
  • Both maternal and paternal DNA
  • Neither paternal nor maternal DNA
According to the evolutionary theory, the formation of a new species is generally due to:
  • Sudden creation by nature
  • Accumulation of variations over several generations
  • Clones formed during asexual reproduction
  • Movement of individuals from one habitat to another
The maleness of a child is determined by
  • The X chromosome in the zygote
  • The Y chromosome in zygote
  • The cytoplasm of germ cell which determines the sex
  • Sex is determined by chance
Why acquired characters are not inherited?
  • Acquired characters do not produce change in the DNA of germ cells.
  • Acquired characters produce change in the DNA of germ cells.
  • Acquired characters do not produce change in the DNA of body cells.
  • All of the above.
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)
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
How is the sex of a newborn determined in humans?
  • The sex of the individual is genetically determined.
  • The sex of the individual is phenotypically determined.
  • The sex of the individual is physiologically determined.
  • All of the above
The number of chromosomes in parents and offsprings of a particular species remains constant due to
  • Doubling of chromosomes after zygote formation
  •  Halving of chromosomes during gamete formation
  • Doubling of chromosomes after gamete formation
  • Halving of chromosomes after gamete formation
The wings of a housefly and the wings of a pigeon are examples of: 
  • Analogous organs
  • Vestigial organs
  • Respiratory organs
  • Homologous organs
Mendelian factors or genes as well as chromosomes are present in_______.
  • Pairs
  • Singles
  • May be paired may be not
  • All of the above
Normally human offspring can be of two types with XX and .......... chromosomes.
  • XY
  • XX
  • XXX
  • YY
A dwarf pea plant is treated with a hormone gibberellic acid. It was found that the plant height increases rapidly. Thus it was conformed that gibberellic acid brings about increase in the height of the plant. If this treated plant is crossed with normal dwarf pea plant, what kind of progeny would you expect?
  • All tall
  • All dwarf
  • 50% tall and 50% dwarf
  • 75% tall and 25% dwarf
What can be inferred from the schematic diagram given below?

87527_80188077010a4dfe8fa2d2802d485be4.png
  • The probability of getting a boy or girl is 50%
  • The probability of getting a boy is higher than that of a girl
  • The probability of getting a girl is higher than that of a boy
  • The probability of getting a boy or girl varies
Which of the following is/are basic features of the mechanism of inheritance?
  • Each gene controls one character.
  • An individual has two forms of the gene whether similar or dissimilar.
  • The two forms of genes are separate at the time of gamete formation and are brought together in the zygote.
  • All of the above
Which of the following set of chromosomes is present in human male?
  • XX
  • YY
  • XY
  • OX
Sex of the child is determined by the type of ................ provided by the father.
  • Sperm
  • Ovum
  • Embryo
  • Zygote
Charles Darwin discovered the laws of inheritance.
  • True
  • False
The traits which are acquired by an organism during its lifetime are called:
  • Acquired traits
  • Inherited traits
  • Skilled traits
  • All of the above
............. traits are unable to express in a hybrid.
  • Recessive
  • Dominant
  • Inherited
  • Acquired
The analogous organs have similar functions but have .......... structures.
  • Same
  • Different
  • Variable
  • All of the above
Genetics is the study of:
  • Genes
  • Cell structure
  • Only plants
  • Only animals
New species may be formed if DNA in germs cells undergoes significant changes or chromosome number changes in the gametes.
  • True
  • False
Human arm is homologous with:
  • Flippers of seal
  • Wing of bird
  • Both A and B
  • Wing of insect
............... is called father of genetics.
  • Mendel
  • Hook
  • Virchow
  • Strasburger
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