GENETICS AND HEREDITY: Objective/Multiple Choice Type Questions Class 10th CHAPTER 14 JKBOSE/NCERT
Objective/Multiple Choice Type Questions
Question 1. 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 runner of grass (d) All of the above.
Ans: (a) Our arm and a dog’s fore-leg
Question 2. In evolutionary terms, we have more in common with
(a) A Chinese school-boy (b) A chimpanzee (c) A spider (d) A bacterium
Ans: (b) A chimpanzee
Question 3. Exchange of genetic material takes place in
(a) Vegetative reproduction (b) Asexual reproduction (c) Sexual reproduction (d) Budding
Ans: (c) Sexual reproduction
Question 4. Which of the following statement is incorrect?
(a) For every hormone there is a gene. (b) For every protein, there is a gene. (c) For the production of every enzyme, there is a gene. (d) For every molecule of fat, there is a gene.
Ans: (d) For every molecule of fat there is a gene.
Question 5. The law of purity of gametes is also called
(a) Law of dominance (b) Law of segregation (c) Law of independent assortment (d)None of the above
Ans: (b) Law of segregation
Question 6. A trait in an organism is influenced by
(a) Only maternal DNA (b) Only paternal DNA (c ) Both maternal and paternal DNA (d) none of the above
Ans: (c) Both maternal and paternal DNA
Question 7. Which of the following statements on sex determination is correct?
(a) In some animals temperature at which fertilized eggs are kept determines the sex of individuals. (b) In snails, sex is not genetically determined. (c) In human beings, sex is genetically determined. (d) All of the above.
Ans: (d) All of the above.
Question 8. A cross between a tall plant (TT) and a short plant (tt) resulted in progeny that was all tall plants as
(a) Tallness is the dominant trait. (b) Shortness is the dominant trait. (c) Tallness is a recessive trait. (d) The height of the plant is not governed by the gene T or t.
Ans: (a) Tallness is the dominant trait.
Question 9. In human males, all chromosomes are paired perfectly except
(a) Large chromosomes. (b) Small chromosomes. (c) Autosomes (d) Sex chromosomes.
Ans: (d) Sex chromosomes.