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Mendels Law Of Segregation PowerPoint Presentation

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Slide 1 - Mendel‘s Law of Segregation by Alexandra Schedat-Spotzl Visit www.worldofteaching.com For 100’s of free powerpoints
Slide 2 - Georg Mendel Austrian monk born in 1822 in monastery known for research and teaching after his death (1884) acknowledgment of his discoveries in 1900
Slide 3 - Experiments with Pea Plants - Seed coat colour (gray or white) - Seed shape (round or wrinkled) - Seed colour (yellow or green) - Pod colour (green or yellow) - Flower position (axial or terminal) - Pod shape (inflated or constricted) - Stem length (tall or dwarf)
Slide 4 - Cross-Pollination of Purebread Plants - cross-pollination between true breeding green and yellow pods - all F1 green F1 Generation Gg = heterozygous
Slide 5 - F2 Generation - self-pollination of green F1 plants - ¾ in F2 green, ¼ yellow - 3 : 1 ratio in pod colour in F2 G = dominant = green g = recessive = yellow GG, gg = homozygous
Slide 6 - Seed Colour C = dominant = yellow c = recessive = green
Slide 7 - Inheritance of Pea Colour phenotype: genotype:
Slide 8 - Results from Mendel's Experiments
Slide 9 - Mendel‘s Generalization Alternative versions of genes account for variations in inherited characters - concept of alleles (G=green, g=yellow) 2. For each character, an organism inherits two genes, one from each parent - two gametes form somatic cells - one allele comes from the mother, one from the father
Slide 10 - 3. If the two alleles differ, then: - dominant allele is fully expressed in the organism's appearance (phenotype) - recessive allele has no noticeable effect on the organism's appearance (genotype) 4. The two genes for each character segregate during gamete production - ensures variation Mendel‘s Generalization
Slide 11 - Law of Segregation the pair of alleles of each parent separate and only one allele passes from each parent on to an offspring which allele in a parent's pair of alleles is inherited is a matter of chance  segregation of alleles occurs during the process of gamete formation (meiosis) randomly unite at fertilization
Slide 12 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.