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.
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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