Question

(1) Theory of natural selection was given by

Mendel

Darwin

None

(2) Thread like structure in the nucleus of a cell formed of DNA which carries the genes is called

Ribosome

Threads

Chromosome

(3)Units of heredity which transfer characteristics or traits from parents to their offsprings during reproduction are called

Genes

Chromosomes

DNA

(4) The gene which can decide the appearance of an organism only in the presence of another identical gene is called

Dominant gene

Recessive gene

Identical gene

(5) The transmission of characters from the parents to their offspring is called

Variation

Heredity

Both

(6)The difference in the characters or traits among the individuals of a species is called


Variation

Heredity

Transmission

(7) Hybrid is the result of cross between

Different varieties of a plant

Same varieties of a plant

Both

(8) The genotypic ratio in mono hybrid cross will be


1:2:1

3:1

4:2


(9) Phenotypic ratio in dihybrid cross

1 point

9:3:1

3:1

4:2

​

Answer 1

Explanation:

1) Darwin

2) Chromosome

3)chorosomes

4) identical gene.

5) Heredity

6)variation

7)Both

8)3:1

9)9:3:1