Rare Swiss
Monday, November 22nd, 2010List the most likely force (or mechanism) resulting from the trend or change in a population?
List forces the opportunity more (or mechanism) resulting from the trend or change in population 1) in HIV patients treated with potent anti-retroviral first shows a decrease in movement of virus but show a rapid increase, despite continued treatment with drugs. 2) The Swiss starlings success most have 4 or 5 eggs. Those who have less or more eggs, are less successful in raising chicks. 3) Two cousins marry and their children suffers from a rare genetic disease.
1. Natural selection and mutation of the virus are first affected by the drug, but some are not affected because of being genetically different from the main population or because of certain mutations. The drugs 'kill' non-resistant virus, leaving only resistant to reproduce (using host cells) and increase in number. 2. Stabilizing natural selection encourages the selection of intermediate phenotypes and the two extreme disadvantage in the phenotype (here, number of eggs laid). The average phenotype is not changed, but the variance is reduced, resulting in a narrowing of the bell curve. 3. Inbreeding inbreeding involves coupling between closely related individuals. He did not create mutations and does not alter the frequency of alleles, but it does not change the frequencies of genotypes by homozygosity increases, perhaps to a large number of loci. increased homozygosity increases the probability of being homozygous for a recessive progeny deleterious.