CBSE Class 10 Science 2019 Delhi Set 1

Question : 12

Total: 28

Name the plant Mendel used for his experiment. What type of progeny was obtained by Mendel in F1 and F2 generations when he crossed the tall and short plants? Write the ratio he obtained in F2 generation plants.
OR
List two differences between acquired traits and inherited traits by giving an example of each.

Solution:

Mendel used pea plant (Pisum sativum) when he crossed tall and short plants the progeny obtained in F1 generation were tall. When the F1 plants were selfed the F2 generations showed three tall and one dwarf plant. The genotypic ratio of F2 generation is 1:2:1
(TT: Tt:Tt:tt)
The phenotypic ratio is 3:1
(Tall : Dwarf)

S.No	Acquired Traits	Inherited Traits
1.	These are somatic variations and do notbring any change in DNA.	These are genetic variations and bring about changes in the DNA
2.	These traits develop throughout the life time of an individual. Example learning of dance and music.	These traits are transferred by or (inherited) by the parents to the offspring. Example Eye colour, Hair colour.

Go to Question:

Prev Question

Next Question