Give differences between :
(a) Heredity and variations.
(b) Dominant and recessive traits.
© Natural and artificial selection.
(a) Heredity: It is the transmission of Characters from parents to the next generation. Variations: The changes that occur in the DNA of an organism because of mutations, or by chance.
(b) Dominant: The trait which is able to express
itself even in the presence of contrasting trait. It appears |n all the progenies in $F_{1}$ generation. Recessive : The trait which can express itself only in homozygous condition. It doesn’t appear in $F_{1}$ generation.
© Natural Selection : Is the gradual natural process by which any biological traits become either more or less common in a population.Example, red beetle eaten up by crow, leading to increase in the population of green beetle. Artificial Selection : It is the artificial mechanism of selecting the breeds having desirable characters to bring about major changes in plant and animals. Example, different vegetables generated from wild variety of cabbage.