Heredity and evolution Online Quiz
Heredity and evolution,class 9, mcq
Questions
The number of pair(s) of sex chromosomes in the zygote of humans is
- One
- Two
- Three
- Four
A zygote which has an X chromosome inherited from father will develop into a
- Boy
- Girl
- X chromosome doesn't determine the sex of the child
- Either boy or girl
Changes occurring in the genetic make up of germ cells of an individual will lead to changes in inheritance of
- Embryonic characters
- Acquired characters
- Inherited characters
- Analogous characters
Organs performing different functions in different species but have similar basic structure and similar embryonic origin
- Homologous organs
- Analogous organs
- Vestigial organs
- Embryonic organs
In following cross in a pea plant, RRYY X rryy the ratio of 4 different types of observed traits would be
- 9:4:2:1
- 7:6:2:1
- 4:4:4:4
- 9:3:3:1
Adenine is a Purine nitrogenous base present in DNA.
- False
- True
Phenomenon where nature selects traits favourable to the species in its environment is
- Artificial selection
- Natural selection
- Homology
- Analogy
Which units are linked in very large numbers to make DNA a polymer?
- Nucleosides
- Nucleotides
- Nucleic acids
- Phosphate groups
The forelimbs of different animals represent ............... organs.
- Vestigial organs
- Superficial organs
- Analogous organs
- Homologous organs
The two versions of a trait (character) which are brought in by the male and female gametes are situated on
- Two different chromosomes
- Sex chromosomes
- Copies of the same chromosome
- Any chromosome