GREGOR MENDEL

GREGOR MENDEL

English paper

Designed by Mrs Micheletti

Power Point in Italian

LAW OF DOMINANCE​

LAW OF SEGREGATION

HIS LIFE

Who's this man?

HIS EXPERIMENTS

states that one form of a hereditary trait dominates or prevents the expression of the recessive trait ​

states that allele pairs separate or segregate during gamete (sex cells) formation.

Gregor Mendel studied different traits of the garden pea (pisum sativum). Why did he choose this plant? ​

LAW OF INDEPENDENT ASSORTMENT

Gregor Mendel is the Father of modern Genetics. He discovered the rules of inheritance.: he was the first person to succed in predicting how traits are passed from one generation to the next..

LIFE KEY FACTS

WE GET ONE ALLELE FROM EACH PARENT! There are three possible combinations: TT: homozygus dominant Tt:heterozygus tt: homozygus recessive

states that allele pairs separate independently during the formation of gametes. This means that traits are transmitted to offspring independently of one another.

- He was born in 1822 in Austria (today Czech Republic) - He worked as a gardener and a bee keeper in his family's farm -From 1840 to 1843 he studied Phylosophy and Physics at the University of Olomouc - He became a friar to obtain an education without paying - From 1854 to 1863 he studied hereditary traits in plants in the garden of his monastery -In 1865 he presented his paper "Experiments on Plant Hybridizatio"

Phenotype: physical appearance of a trait (ex. Tall, short, green, yellow) Genothype: the genetic constitution of an individual. ​

There must be something hidden... ​

Why do children look like their parents? ​

• Genotype: the genes present in the DNA of an organism. We use a pair of letters ( ex.: Tt or YY, ss etc.) to represent genotypes for one particular trait. There are always two letters in the genotype because ( as a result of sexual reproduction) one code for the trait comes from mama organism and the other comes from papa organism, so every offspring gets two codes (two letetrs).
• Phenotype: how the trait physically shows-up in the organism.

• Genetics: the scientific study of heredity (passing of traits from parents to offspring)
• Heredity: the passing down of traits from parents to offspring via genes and chromosomes.
• Trait: what an organism look or behave like.
• Alelle: particular form of a trait (represented by letters). There are two alleles in every gene. An allele (the dominant) can mask the other allele (the recessive).
• Gene: a section of DNA that determines a trait.

AND THEN...THE DISCOVERY OF DNA.... ​