Gregor mendel laws of heredity ppt
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Mendel's laws method heredity
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MENDELS LAW OF INHERITANCE
Related papers
Marin Danciu
Journal of Health & Medical Informatics, 2012
By Mendel laws the way of transmitting characters from parents to descendants was less clarified, and in some regards (dominance, recessiveness, sex chromosomes, gametes endowment, transmitting some characters to the 1 st , 2 nd , the 3 rd generation etc.) consistent errors were made. Also, for to find out why most girls resemble more with their fathers and most boys resemble more with their mothers a good inspiration led to the creation (Figure 1). Once made this chart, was easy to see that it suggests the existence of several rules by which the characters from parents to their descendants are transmittedtransmitted. Based on this chart, are discovered and formulated four new laws of heredity: the law of gametes' contribution, the law of sex chromosomes, the law of hereditary autosomal factors, and the law of gametes endowment. Methods Practical observations of reality (to humans, plants, animals); Multidisciplinary theoretical studies. Danciu chart (Figure 1) Explanations: (Figure 1) At the moment of the entrance in the fallopian tube, the sperm (with X or Y chromosome) and the ovule have an energy of a certain size, noted on
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10.1 Mendel’s Laws of Heredity
Presentation on theme: "10.1 Mendel’s Laws of Heredity"— Presentation transcript:
1 10.1 Mendel’s Laws of Heredity
Part 2
2 Mendel’s Research
3 Mendel’s Research Monohybrid Cross Tall plant and short plant
First offspring generation(F1) = all tallSecond offspring generation(F2) = 3 tall: 1 shortMendel called the tall allele dominant and the short allele recessive
4 Laws of Heredity When describing experiments of heredity
Each trait is represented by a letterCapital for dominant, lowercase for recessiveTT x tt
5 Laws of Heredity An adult plant has two alleles for a trait
A gamete has one allele, each parent gives one allele to the offspring
6 Laws of HeredityDuring fertilization gametes randomly pair to produce combinations of allelesLaw of Segregation
7 Laws of Heredity Genotype = gene combination, TT, tt, Tt
Homozygous = two of the same allelesHeterozygous = two different allelesPhenotype = outward appearanceTall or short
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9 Laws of Heredity Law of independent assortment
Genes for different traits are inherited independently
10 Laws of Heredity Law of independent assortment
Genes for different traits are inherited independently