Q15 of 40 Page 11

The inheritance of characteristics through generation is called “heredity”. In Mendel's Pisumsativum plant, the genetic material responsible for heredity is __________.

Heredity is the transfer of characters from one generation to next.


DNA is a thread like a chain of nucleotides that carry genetic information. It is always double-stranded and contains nitrogen bases(adenine, guanine, thymine, and cytosine). It is the genetic material of almost all living organisms.

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13

Identify the incorrect statement about identical twins.

 14

The correct statement about Neanderthal man is:

 1

Mendel has observed Tallness as a dominant character in the garden pea plant.

Similarly, tongue rolling is a dominant character in man. In a group of 60 students,


45 can roll their tongue and 15 are non-rollers.


i) In the above context, calculate the percentage of dominant and recessive characters.

 2

The inheritable characters vary in different species and within the same species. Name the variation in the following cases.

The eye colour among the human beings are varied as blue, black, brown, green, etc.


i) This is called as _______variation.


The dentition in the rabbit and the elephant are not the same.


ii) This is called as __________ variation.