Class 9 | Heredity and Variation

DNA was discovered by

1/30

Sex chromosomes are called …..........

2/30

What is DNA?

3/30

The chromosome in which the centromere is near one end of the chromosome is called ….... chromosome.

4/30

….... is a mitochondrial disorder.

5/30

…........ is a dominant character of pea plant.

6/30

What is genetic variation?

7/30

What is phenotype?

8/30

…........ is a monogenic disorder

9/30

….. is a recessive character of pea plant

10/30

The double helix model of DNA was produced by

11/30

In a monohybrid cross, the phenotypic ratio of F2 generation is

12/30

What is sexual reproduction?

13/30

If one parent is normal and one parent is carrier of sickle-cell anaemia, then the progenies will be

14/30

What is variation?

15/30

What is a gene?

16/30

Which of the following is absent in RNA?

17/30

…........ is a recessive character in human beings.

18/30

What is genotype?

19/30

What are recessive traits?

20/30

What is heredity?

21/30

What is genetic variation?

22/30

What are dominant traits?

23/30

…........ is a dominant character in human beings

24/30

The molecule of RNA which is a component of the ribosome organelle is called a

25/30

Progenies of normal man and sufferer woman for sickle-cell anaemia will be …..........

26/30

What is a chromosome?

27/30

What is a mutation?

28/30

….......... arises due to either inheritance of only X chromosome from parents or due to inactivation of the gender-related part of X-chromosomes.

29/30

If one parent is carrier and one parent is a sufferer of sickle-cell anaemia, then the progenies will be

30/30

Prev Next

Class 9 | Science | Heredity and Variation

1 / 30

What is genetic variation?

The diversity of alleles and genes within a population or species.

The passing on of physical or mental characteristics genetically from one generation to another.