Who was Gregor Mendel Gregor Mendel the father

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Who was Gregor Mendel? Gregor Mendel- the father of Genetics -conducted experiments with pea

Who was Gregor Mendel? Gregor Mendel- the father of Genetics -conducted experiments with pea plants & determined that traits are passed on from parent to offspring.

Gregor Mendel • Gregor Mendel (born in 1822) was an Austrian monk who became

Gregor Mendel • Gregor Mendel (born in 1822) was an Austrian monk who became known as the "father of modern genetics, " discovered the basic principles of heredity through experiments in his monastery's garden. • His experiments showed that the inheritance of certain traits in pea plants follows particular patterns.

Pea Plant Experiment

Pea Plant Experiment

Genes determine Traits! • Genes (sections of DNA) have the instructions for creating Proteins

Genes determine Traits! • Genes (sections of DNA) have the instructions for creating Proteins (at the ribosome) • Proteins determine traits.

Chromosomes, Genes and Alleles Chromosomes: structures made up of protein and DNA. They are

Chromosomes, Genes and Alleles Chromosomes: structures made up of protein and DNA. They are found in the nucleus of cells. DNA is wrapped around chromosomes. Genes: sections of DNA that code for traits. Alleles: different versions of a gene.

Chromosomes, Genes, Alleles • Chromosomes are made up of many genes joined together like

Chromosomes, Genes, Alleles • Chromosomes are made up of many genes joined together like beads on a string. • The chromosomes in a pair may have different alleles (versions of a gene) for some genes and the same allele for others. • Ex- b = allele for blue eyes, B = allele for brown eyes. (alleles are represented by upper and lower case letters) • We inherit one allele from each parent (it is in the sperm or egg).

How did all of the plants end up TALL?

How did all of the plants end up TALL?

Dominant vs. Recessive • An organism with a dominant allele for a particular form

Dominant vs. Recessive • An organism with a dominant allele for a particular form of a trait will always have that form • An organism with a recessive allele for a particular form of a trait will have that form only when the dominant allele is not present

Phenotype vs. Genotype • Phenotype is what form of a trait that an organism

Phenotype vs. Genotype • Phenotype is what form of a trait that an organism shows – Tall, short, pink, white • Genotype is what actual alleles an organism carries – Tt, TT, tt, Ww, WW, ww