Class 9 | Heredity and Variation

What is sexual reproduction?

1/30

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

2/30

What are recessive traits?

3/30

Which of the following is absent in RNA?

4/30

What is genotype?

5/30

….... is a mitochondrial disorder.

6/30

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

7/30

The double helix model of DNA was produced by

8/30

What is DNA?

9/30

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

10/30

What is a gene?

11/30

What is heredity?

12/30

…........ is a monogenic disorder

13/30

What is variation?

14/30

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

15/30

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

16/30

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

17/30

What is genetic variation?

18/30

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

19/30

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

20/30

What is a mutation?

21/30

DNA was discovered by

22/30

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

23/30

What is genetic variation?

24/30

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

25/30

….. is a recessive character of pea plant

26/30

What is phenotype?

27/30

What are dominant traits?

28/30

What is a chromosome?

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.