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The expected ratio of phenotypes among the progeny of a test cross is 1:1:1:1. Out of 200 total resulting progeny, 48 occur in one of the four phenotypic classes. Given this information, which of the following must also be true? 1) Since 48 is so close to the expected value, […]

1. Genes that are located on thesame chromosome are a. linkedb.homozoygousc.chromologsd.holosgouse. coupled 2. Genes that are linked a. do not assort independently during meiosis.b. are always on the x chromosomec. segregate to opposite poles during meiosisd. are on nonhomologous chromosomese. segregate independtly during meiosis 3. A chromosome contains alleles forblue […]

Humans and Climate Change Human activities may contribute to climate change in several ways. The largest known contribution, from humans to the atmosphere, comes from burning fossil fuels, which releases carbon dioxide and other greenhouse gases to the atmosphere. Do you believe that human activities are contributing to climate change […]

A dig breeder discovers two of her puppies have abnormal genitalia. Chromosomal tests (cytogenetic analyses ) indicate that the male dog’s karyotype lacks a Y chromosome, but instead has an XX chromosome pair, with one of the X-chromosome slightly larger than usual. Whereas, the female dog’s karyotype reveals an XY […]