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Zebra Corn

By Andrew Greenwood, Martha Swenson, and Julia Kunberger. School of Arts & Sciences. Zebra Corn. zebra crossbands4 (zb4), AG, JJK, MS, 1-13-05. About Our Project.

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Zebra Corn

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  1. By Andrew Greenwood, Martha Swenson, and Julia Kunberger School of Arts & Sciences Zebra Corn zb4_AG_JJK_MS, 1-13-05 zebra crossbands4 (zb4), AG, JJK, MS, 1-13-05

  2. About Our Project Throughout the semester, we have been studying mutant corn. We decided to study zebra Crossbands4 (zb4), a mutant known for its exotic stripes. This is our project. Slender, so slender Its stalk bends under dew— Little yellow ear -A Zen Poet zb4_AG_JJK_MS, 1-13-05

  3. What is Wrong? Our mutant is called “Zebra” because of it’s zebra-like stripes on the leaves. The mutation is called zebra crossbands4(zb4).The mutation has a recessive mode of inheritance. The zb4 gene has not yet been cloned. What causes these stripes? zb4_AG_JJK_MS, 1-13-05

  4. What causes these stripes? There are many different theories on what causes the zebra-like stripes on the leaves. Scientists have not yet discovered the exact cause for the stripes. We have some simple theories based on our knowledge. zb4_AG_JJK_MS, 1-13-05

  5. Relationship of the pairs of alleles* HomozygousDominant2 Dominant alleles ZZ Normal leaves(wild-type) ZzzZ Heterozygous1 Dominant allele1 recessive allele Normal leaves(wild-type, carrier) Homozygousrecessive2 recessive alleles zz Striped leaves(mutant) Genotype & Phenotype Chart Genotypeof individual Phenotypeof individual * Alleles = different forms of the same gene zb4_AG_JJK_MS, 1-13-05

  6. Diagram Young Leaf Barely striped Middle-Aged Leaf Light stripes (developing) Old Leaf Vibrant yellow & green stripes zb4_AG_JJK_MS, 1-13-05

  7. Date Height Width Mean H Color 9/10 30 mm 1 mm 48.7 mm Pale green. Very small and weak. 9/24 124 mm 15 mm 150 mm Red at base. Light green. NOT ZEBRA! Some leaves have dead patches. The mode of inheritance for zb4 is recessive 10/11 198 mm 10 mm 190 mm Yellow, brown, and green. Stems: purple. Starting to shrivel turn brown. Starting to die! Stopped growing and started dying. Growth Chart zb4_AG_JJK_MS, 1-13-05

  8. Discoverer and References (1932) HK Hayes. Zebra Crossbands. Journal of Heredity. Volume 23, pages 415-419. (1938) HK Hayes. Zebra Seedling, zb4, has been located in chromosome 1. Maize Newsletter. Volume 12, page 1. (1939) HK Hayes. Recent Linkage studies in maize. III. Zebra Seedling-4. Genetics. Volume 24, page 60-61. zb4_AG_JJK_MS, 1-13-05

  9. The End zb4_AG_JJK_MS, 1-13-05

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