Genome is the sum of all the genes occurring in the cells of a given individual. In contrast, genotype is the sum of all the alleles of a particular individual. The nuclear genome is the sum of all the genes occurring in the nucleus of the cell; the cytoplasmic or organelle genome is the sum of the genes contained in the DNA of cell organelles, mitochondria or plastids. The genomes of males and females of a certain species can differ in the presence or number of sex chromosomes, i.e. chromosomes whose occurrence or number determines whether the individual will develop as a male or female, see Y Chromosome.

Was this information useful for you?
The classical Darwinian theory of evolution can explain the evolution of adaptive traits only in asexual organisms. The frozen plasticity theory is much more general: It can also explain the origin and evolution of adaptive traits in both asexual and sexual organisms Read more