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MENDELandHEREDITY
Gregor Mendel He is the Father ofGENETIC. He used Pea Plants (Pisumsativum) for experiment.He crossed Pea Plantswith di...
What is GENETIC ?Genetics is the study of HEREDITY.3What is HEREDITY ?The passing on of characteristics(traits) from par...
WHY MENDEL USED PEA PLANT FORHER EXPERIMENT ?o They have two distinct, male and female, sex cellscalled gametes.4o Pea pla...
5Mendel controlled thefertilization of his pea plantsby removing the male parts,or stamens.He then fertilized the femalepa...
6Pea Plant can harvest for only 12 to 15 Weeks.
Characteristic of Pea Plant7
He crossed Pea Plants withdifferent Traits8• Fertilization - theuniting of male andfemale gametes(sex cell).• Cross - comb...
P1 = parent in the 1st generation The offspring of P1 were called the F1generation“F” stands for filialFilial stands for...
10What Did Mendel Find?He discovered different laws and rulesthat explain factors affecting heredityEach organism has two ...
11Rule of DominanceDominant AllelesIn heterozygote, the allele that is fullyexpressed in the phenotype.The letter should ...
12LAW OF SEGREGATIONThe offspring then receives its own pair ofalleles for that trait. Whichever of the twoalleles in the ...
13
14State that allele pairs separateindependently during the formation ofgametes. this means that traits aretransmitted to o...
15
16oGenotype:the gene combination of an organism.o-AA or Aa or aaoPhenotype: the way an organism looks.o-red hair or brown ...
17Homozygous and HeterozygousoHomozygous: if the two alleles for a trait arethe same (TT or tt)oHeterozygous: if the two a...
18HomozygousHeterozygous
Dihybrid vs Monohybrid• Dihybrid Cross -crossing parents whodiffer in two traits(AAEE with aaee)• Monohybrid Cross -crossi...
20
21In some species of plants, tall plantsare dominant to short plants. Predictthe outcomes between a homozygousdominant pla...
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Mendel and Heredity

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Mendel and Heredity

  1. 1. MENDELandHEREDITY
  2. 2. Gregor Mendel He is the Father ofGENETIC. He used Pea Plants (Pisumsativum) for experiment.He crossed Pea Plantswith different Traits.2 Gregor Mendel (an Austrianmonk) made the first studies inpredicting how traits would transferfrom one generation to another.
  3. 3. What is GENETIC ?Genetics is the study of HEREDITY.3What is HEREDITY ?The passing on of characteristics(traits) from parents to offspring.
  4. 4. WHY MENDEL USED PEA PLANT FORHER EXPERIMENT ?o They have two distinct, male and female, sex cellscalled gametes.4o Pea plants are also inexpensive, easy tomaintain, and grow quickly.o Mendel used pea plants because they easilyknown each of its traits.
  5. 5. 5Mendel controlled thefertilization of his pea plantsby removing the male parts,or stamens.He then fertilized the femalepart, or pistil, with pollen froma different pea plant.
  6. 6. 6Pea Plant can harvest for only 12 to 15 Weeks.
  7. 7. Characteristic of Pea Plant7
  8. 8. He crossed Pea Plants withdifferent Traits8• Fertilization - theuniting of male andfemale gametes(sex cell).• Cross - combininggametes fromparents withdifferent traits.
  9. 9. P1 = parent in the 1st generation The offspring of P1 were called the F1generation“F” stands for filialFilial stands for son or daughter The offspring of the cross between 2F1 plants were called the F2 generation9
  10. 10. 10What Did Mendel Find?He discovered different laws and rulesthat explain factors affecting heredityEach organism has two alleles for each traitAlleles - different forms of the same gene.Genes - Units responsible for passing on traits fromone generation to the next.Rule of Unit Factors
  11. 11. 11Rule of DominanceDominant AllelesIn heterozygote, the allele that is fullyexpressed in the phenotype.The letter should be (uppercase)Recessive AllelesIn the homozygous, its expressionmasked in the presence of a dominantgene.The Letter should be (lowercase)
  12. 12. 12LAW OF SEGREGATIONThe offspring then receives its own pair ofalleles for that trait. Whichever of the twoalleles in the offspring is dominant determineshow the offspring expresses that trait (e.g.the color and height, etch.).
  13. 13. 13
  14. 14. 14State that allele pairs separateindependently during the formation ofgametes. this means that traits aretransmitted to offspring independently ofone other.Law of IndependentAssortment
  15. 15. 15
  16. 16. 16oGenotype:the gene combination of an organism.o-AA or Aa or aaoPhenotype: the way an organism looks.o-red hair or brown hairGenotype and Phenotype
  17. 17. 17Homozygous and HeterozygousoHomozygous: if the two alleles for a trait arethe same (TT or tt)oHeterozygous: if the two alleles for a trait aredifferent (Tt)
  18. 18. 18HomozygousHeterozygous
  19. 19. Dihybrid vs Monohybrid• Dihybrid Cross -crossing parents whodiffer in two traits(AAEE with aaee)• Monohybrid Cross -crossing parents whodiffer in only one trait(AA with aa)
  20. 20. 20
  21. 21. 21In some species of plants, tall plantsare dominant to short plants. Predictthe outcomes between a homozygousdominant plant and a short plant.TT x ttT = tall dominant plantt = short plantGenotype- 100 % TallPhenotype- Tall

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