Genes come in variant forms called __________. A gene pool is defined as all the _______ that exist in a ________.
Adv.
The genetic constitution of an organism is termed as the organism’s genotype. The physical features and behavioural characteristics of an organism are termed as the organism’s phenotype. It is important to note that the genotype of an organism accounts for its phenotype characteristics. The genotype represents all the genes of an organism. The genes are the main factors, which shape the physical features and behavioural characteristics in any organisms.
It well known that numerous genes are responsible for the production of phenotype in any organism. In the case of organism, which reproduces sexually, the genes coding for a particular phenotype character occur in different forms, and are termed as alleles.
Match the terms with their meanings:
| a. gene pool | a variant form of a gene |
| c. allele frequency | the genetic makeup of an organism |
| d. genotype | exchange of genes between populations |
| e. gene flow | the relative representation of a given form of a gene in a population |
Match the agent of microevolution to its description:
| a. mutation | chance alterations of allele frequencies, having the greatest effect on small populations |
| b. gene flow | a process through which traits that confer a reproductive advantage to individuals are seen with greater frequency in succeeding generations of a population |
| c. natural selection | movement of alleles between populations by migration |
| d. genetic drift | genetic drift brought about by migration of a subpopulation |
| e. founder effect | changes in the genetic material |