Heredity:Transmission of characters (resembles as well as variations) from parents to the off springs, i.e., from one generation to the next generation is called heredity.
Mendel’s Monohybrid Cross
A breeding experiment dealing with a single character is called a monohybrid cross.
Mendel’s Dihybrid Cross
A breeding experiment dealing with two characters at the same time is called a dihybrid cross.
Differences between Inherited and Acquired Traits
|Inherited Traits||Acquired Traits|
|1. These are obtained from the parents.||1. These are developed during the life of an individual.|
|2. These are genetic variations.||2. These are somatic variations.|
|3. These develop due to crossing over phenomenon and mutations.||3. These develop due to use and disuse off organs and|
|4. These are passed on from one generation to the other.||4. These die with the death of the individual.|
Differences between Homologous Organs and Analogous Organs
|Homologous Organs||Analogous Organs|
|1. These generally look different externally.||1. These generally look similar externally.|
|2. These generally perform different functions.||2. These perform similar function.|
|3. These are similar in basic plan and origin.||3. They are different in basic plan and origin.|
|4. These depict divergent evolution or adaptive radiations.||4. They show convergent evolution.|
Differences between artificial selection and natural selection.
|Artificial selection||Natural selection|
|1. It is an artificial process.||1. It is a natural phenomenon.|
|2. It is controlled by man on a limited scale in specific laboratories.||2. It is conducted by nature on a vast scale all over the world.|
|3. Traits selected for improvement are beneficial to man.||3. Traits selected for evolution are beneficial to the species.|
|4. Results are achieved in a short period.||4. Results are achieved over a long period of time.|
Q1. Define Evolution?
Q2. What is Heridity?
Q3. Differences between artificial selection and natural selection