Shikshakendra

Mendel's Experimentation  After obtaining plants pure for their characters Mendel started his experiments. Mendel did not consider a number of characters at the same time. He first conducted experiment by considering only a single character. This cross dealing with only a single character at a time is termed as monohybrid cross. Similarly he conducted experiments by taking two characters at a time. This was termed as dihybird cross. Mendel's Monohybrid Cross  In one of his experiments Mendel selected plants having contrasting characters for height, i.e. he selected long plants (above six feet) and dwarf plants (about one foot). Being pure for their characters, the plants were homozygous long and and homozygous dwarf. These plants represented the parental  (P) generation. He cross-pollinated the long and dwarf plants. He collected the seeds obtained from this cross and grew them. The plants obtained from this cross were long, none of them was dwarf or of intermediate size....

~ HEREDITY  The transmission of traits from parents to offsprings is termed as heredity. This transmission takes place by the process of reproduction. The reproductive process generates the individuals of similar design. The transmission or inheritance of characteristics from parents to offsprings is governed by certain well defined rules called the rules of heredity.  INHERITED TRAITS   The traits (characteristics) obtained from parents are termed as inherited traits. You must have seen a number of children similar to their parent (s). This is because of the traits which they inherited from their parents. Body design, shape, colour, etc. are all inherited from parents. Though all human beings are similar, still they possess variations. For example, free and attached earlobes are two variants found in human populations.  Rules for the Inheritance of Traits : Mendel ' s Contributions Every human individual has two copies of genetic material, i.e. DNA. The gametes...