Nuclear division at the DNA level Mitosis in a haploid cell Mitosis in a diploid cell Meiosis S Phase S Phase S Phase Chromatid Chromatid Chromatid formation formation formation Mitosis Mitosis Meiosis Alignment on equator Alignment on equator Pairing of homologs at equator (tetrad) AVAY Chromatid segregation Chromatid segregation Chromosome segregation End of first division and and A End of second division and and Daughter cells All A Daughter cells All Ala Sex cells FIGURE 2-11 DNA and gene transmission in mitosis and meiosis in eukaryotes. The S phase and the main stages of mitosis and meiosis are shown. Mitotic divisions (left and middle) conserve the genotype of the original cell. At the right, the two successive meiotic divisions that take place during the sexual stage of the life cycle have the net effect of halving the number of chromosomes. The alleles A and a of one gene are used to show how genotypes are transmitted in cell division.
Nuclear division at the DNA level Mitosis in a haploid cell Mitosis in a diploid cell Meiosis S Phase S Phase S Phase Chromatid Chromatid Chromatid formation formation formation Mitosis Mitosis Meiosis Alignment on equator Alignment on equator Pairing of homologs at equator (tetrad) AVAY Chromatid segregation Chromatid segregation Chromosome segregation End of first division and and A End of second division and and Daughter cells All A Daughter cells All Ala Sex cells FIGURE 2-11 DNA and gene transmission in mitosis and meiosis in eukaryotes. The S phase and the main stages of mitosis and meiosis are shown. Mitotic divisions (left and middle) conserve the genotype of the original cell. At the right, the two successive meiotic divisions that take place during the sexual stage of the life cycle have the net effect of halving the number of chromosomes. The alleles A and a of one gene are used to show how genotypes are transmitted in cell division.
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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In Figure 2-11, assume (as in corn plants) that allele A
encodes an allele that produces starch in pollen and allele a does not. Iodine solution stains starch black. How
would you demonstrate Mendel’s first law directly with
such a system?
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