FIGURE 3-8 Meiosis in a diploid cell of genotype Ala; B/b. The diagram shows how the segregation and assortment of different chromosome pairs give rise to the 1:1:1:1 Mendelan gametic ratio. Independent assortment of chromosomes at meiosis explains Mendel's ratio LounchPad ANIMATED ART: Meiotic recombination between unlinked genes by independent assortment Interphase. Chromosomes are unpaired. Prophase. Chromosomes and centromeres have replicated, but centromeres have not split. Prophase. Homologs synapse. Anaphase. Centromeres attach to spindle and are pulled to poles of cell. The other, equally frequent, alignment Telophase. Two cells form. Second anaphase. New spindles form, and centromeres finally divide. B End of meiosis. Four cells produced from each meiosis. equal frequencies. In other words, the frequency of each of the four genotypes is 1/4. This gametic distribution is that postulated by Mendel for a dihybrid, and it is the one that we inserted along one edge of the Punnett square in Figure 3-4. The random fusion of these gametes results in the 9:3:3:1 F2 phenotypic ratio.
FIGURE 3-8 Meiosis in a diploid cell of genotype Ala; B/b. The diagram shows how the segregation and assortment of different chromosome pairs give rise to the 1:1:1:1 Mendelan gametic ratio. Independent assortment of chromosomes at meiosis explains Mendel's ratio LounchPad ANIMATED ART: Meiotic recombination between unlinked genes by independent assortment Interphase. Chromosomes are unpaired. Prophase. Chromosomes and centromeres have replicated, but centromeres have not split. Prophase. Homologs synapse. Anaphase. Centromeres attach to spindle and are pulled to poles of cell. The other, equally frequent, alignment Telophase. Two cells form. Second anaphase. New spindles form, and centromeres finally divide. B End of meiosis. Four cells produced from each meiosis. equal frequencies. In other words, the frequency of each of the four genotypes is 1/4. This gametic distribution is that postulated by Mendel for a dihybrid, and it is the one that we inserted along one edge of the Punnett square in Figure 3-4. The random fusion of these gametes results in the 9:3:3:1 F2 phenotypic ratio.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Inspect Figure 3-8: which meiotic stage is responsible
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