Advertisements
Advertisements
Question
What are genes? Where are the genes located?
Solution
Genes are basic units of hereditary. They are the means of passing characters/ traits from one generation to another. Genes are located on chromosomes. They are linear segments of DNA that code for a gene product. They can be dominant or recessive depending upon how they express themselves.
RELATED QUESTIONS
Define evolution. How does it occur?
Fill in the following blank with suitable word :
The human forelimb and bat's forelimb are an example of .......... organs whereas an insect's wing and a bat's wing are an example of ........... organs.
What is meant by acquired and inherited traits? Explain with one example each.
Explain the terms 'analogous organs' and 'homologous organs' with examples.
According to scientists, aves have evolved from :
(a) mammals
(b) amphibians
(c) reptiles
(d) arthropods
Out of the wing of a bird, wing of an insect and the wing of a bat :
which two are analogous organs?
Read the following statement and justify same in your own words with the help of suitable example.
Human evolution began approximately 7 crore years ago.
Very short answer question.
Define the Gene pool
Short answer question.
Draw a graph to show that natural selection leads to disruptive change.
Short answer question.
Give an example of disrruptive selection