AP BIOLOGY

Detailed explanation-1: -Sexual reproduction results in infinite possibilities of genetic variation. In other words, sexual reproduction results in offspring that are genetically unique. They differ from both parents and also from each other. This occurs for a number of reasons.

Detailed explanation-2: -Sexual reproduction also results in genetic variation among siblings. When a parent forms a gamete, only one chromosome from each homologous pair is included at random. So, an offspring might inherit a different combination of chromosomes (and alleles) compared to its siblings.

Detailed explanation-3: -Phenotypic variation can be produced by genetic differences, environmental influences and stochastic developmental events.

Detailed explanation-4: -For a single gene that is expressed following a complete dominance pattern, there are two possible phenotypes: the one associated with the dominant allele (shown by homozygous dominant and heterozygous individuals), and that of the homozygous recessive.