Answer:
there is a greater variety of genes and species in that ecosystem
Answer choice D seems to be correct.
Answer and Explanation:
In current years the subject of inherited disorders in pedigree dogs has been extensively discussed. This article discussed the consequences related to repeat breeding of pedigree dogs. In the last few years several pedigree breeds have been generated which depend on the selection of particular behavioral and physical features. The development of pedigree dog breeds can be both a curse and a blessing. The desired characteristics are severely taken, while undesired characteristics can be unintentionally secure within the breed. The repeated breeding of purebred dogs lead the loss of genetic diversity. The loss of genetic diversity can be attributed to two major actions; the first one happening in domestication and the second arising from the development of breed. Where the repeated use of line breeding, popular sires, promotion of breed barrier rule and breeding for particular phenotypic traits contributed to loss of genetic variation. Widespread use of a popular sires leads to overrepresentation of that dog’s genome in breed. Overrepresentation of a popular sires genome increase the risk of monogenetic inherited disorders. According to the other article inbreeding causes severe birth abnormalities and defects such as epilepsy, and heart diseases that could make the lives of animals miserable. These problems start in the 19th century, when dog fanciers activated to set down desired physical characteristics. The scientific evidence shows that ninety percent dogs are said to be healthy. According to the both articles repeated breeding of pedigree dogs cause many genetic disorders.
A gene is a stretch of DNA or RNA that determines a certain trait. Genes mutate and can take two or more alternative forms; an allele is one of these forms of a gene. An allele refers to a specific variation of a gene.
