cystic imato. Huntington\'s disease (HD) affects males and females equally and c
ID: 141361 • Letter: C
Question
cystic imato. Huntington's disease (HD) affects males and females equally and crosses all ethnic and racial boundaries. It Ih typically begins in mid-life, between the ages of 30 and 45, though onset may occur as early as the age of 2. Children who develop the juvenile form of the disease rarely live to adulthood. There is a 50/50 chance of inheriting the fatal gene from the parents. Huntington's disease is an autosomal dominant condition. Everyone who carries the gene will develop the disease. people per 100,000 are affected by HD. If populations of Western countries we Huntington's disease gene, what proportion of the population would be carriers of the HD allele? (1pt) (4 places after decimal) In Western countries, it's estimated that about five to seven re mating randomly for the 5. You discover a willow species (Salix sp.) growing in soil contaminated with toxic PCBs near an abandoned factory, and later determine that the PCB resistance is due to a single dominant allele. Homozygous recessive ondition is lethal. (3 pts a. If 45% of the seeds from a randomly mating population of resistant weeds will germinate in contaminated soil, while the rest die. What is the frequency of the PCB-resistance allele? (2 places after decimal) b. Among all the plants that germinate in contaminated soil, what proportion will be heterozygous? (2 places after decimal) Among all the plants that germinate, what proportion will be homozygous dominant? (2 places after decimal)Explanation / Answer
As hunginton disease us autosomal dominant,the carrier of the disease is also effeced.So, among five to seven people half of them could carriers and half could be affected.
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