A recessive characteristic can appear only if the genotype is heterozygous.

Individual differences are called variation.

Discontinuous variation is a clear cut distinction between two traits.

Two chromosomes which are not identical in shape and size are termed as homologous chromosomes.

DNA is normally a stable molecule with the capacity for self-replication.

Phenotype is the genetic constitution of an organism.

The alleles of the genes are different in hybrid organisms.

The term hybrid is synonymous with homozygous condition.

Monohybrid inheritance refers to the inheritance of two characteristics.

Fertilization is at random, thus the genes are not recombined.

The process of mutation, a gene may be changed into only two alternative forms.

The eye and skin colour in man are the examples of discontinuous variation.

Chromosomes contain genes, the units of heredity.

The genetic constitution of an organism is genotype.

Type O blood can only result from the inheritance of one is alleles.

Genetics is the branch of biology concerned with heredity and variation.

DNA controls proteins synthesis within the cytoplasm without the help of RNA.

Heterozygote produces the same kinds of gametes.

The genes reside in a long molecule called chromosome.