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.
What is GENETIC ?Genetics is the study of HEREDITY.3What is HEREDITY ?The passing on of characteristics(traits) from parents to offspring.
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.
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.
6Pea Plant can harvest for only 12 to 15 Weeks.
He crossed Pea Plants withdifferent Traits8• Fertilization - theuniting of male andfemale gametes(sex cell).• Cross - combininggametes fromparents withdifferent traits.
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
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
11Rule of DominanceDominant 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)
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.).
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