Gregor Mendel's first law of genetics states "Of a pair of contrasted characters, only one can be represented in a gamete by its internal 'factor'.

(a) Give the modem name for this 'factor'.


(b) State where these factors are found in gametes.

(a) This factor is known as Genes. They are unit of heredity transferred from parents to offspring. Each parent has a gene pair in each cell for each trait studied. One member of the gene pair segregates into a gamete, thus each gamete only carries one member of the gene pair and hence only one out of a pair of contrasted characters is represented in a gamete by its gene.

(b) These internal factors known as genes are found on chromosomes which are made of DNA and protein and found in the nucleus of the cell.


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