NCERT Class X Science Class: Chapter –9. Heredity and Evolution – Part-4

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Question 16:

A trait in an organism is influenced by

(a) Paternal DNA only

(b) Maternal DNA only

(c) Both maternal and paternal DNA

(d) Neither by paternal nor by maternal DNA

Answer: C

Image trait influenced maternal and paternal DNA

Image Trait Influenced Maternal and Paternal DNA

Image trait influenced maternal and paternal DNA

Question 17:

Select the group which shares maximum number of common characters

(a) Two individuals of a species

(b) Two species of a genus

(c) Two genera of a family

(d) Two genera of two families

Answer: A

Question 18:

According to the evolutionary theory, formation of a new species is generally due to

(a) Sudden creation by nature

(b) Accumulation of variations over several generations

(c) Clones formed during asexual reproduction

(d) Movement of individuals from one habitat to another

Answer: B

Image r of a new species is generally due

Image R of a New Species is Generally Due

Image r of a new species is generally due

Question 19:

From the list given below, select the character which can be acquired but not inherited

(a) Color of eye

(b) Color of skin

(c) Size of body

(d) Nature of hair

Answer: C

Question 20:

The two versions of a trait (character) which are brought in by the male and female gametes are situated on

(a) Copies of the same chromosome

(b) Two different chromosomes

(c) Sex chromosomes

(d) Any chromosome

Answer: A

Image Chromosome theory of inheritance

Image Chromosome Theory of Inheritance

Image Chromosome theory of inheritance

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