Lecture 4 Answers - Lecture 4: Study Questions and Answers...

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Lecture 4 : Study Questions and Answers 1. What is the principle of independent assortment? How is it related to the principle of segregation? According to the principle of independent assortment, genes for different characteristics that are at different loci segregate independently of one another. The principle of segregation indicates that the two alleles at a locus separate; the principle of independent assortment indicates that the separation of alleles at one locus is independent of the separation of alleles at other loci. 2. In which phases of mitosis and meiosis are the principles of segregation and independent assortment at work? In anaphase I of meiosis, each pair of homologous chromosomes segregate independently of all other pairs of homologous chromosomes. The assortment is dependent on how the homlogs line up during metaphase I. This assortment of homologs explains how genes located on different pairs of chromosomes will separate independently of one another. Anaphase II results in the separation of sister chromatids and subsequent production of gametes carrying single alleles for each gene locus as predicted by Mendel’s principle of segregation. 3. In snapdragons, red flower color (R) is incompletely dominant over white flower color (r); the heterozygotes produce pink flowers. A red snapdragon is crossed with a white snapdragon, and the F1 are intercrossed to produce the F2. a. Give the genotypes and phenotypes of the F1 and F2, along with their expected
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Lecture 4 Answers - Lecture 4: Study Questions and Answers...

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