Gregor Mendel - father of genetics!

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Gregor Mendel- father of genetics!

• Austrian Monk
• tended to the garden in the monastery
• now it is located in CZ

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Performed Experiments Using garden peas because
they.

• grow quickly
• are hardy plants
• self-pollinate
• ? pure for each trait

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Parental Generation or P1 generation
All the offspring were tall ????? Called first
filial or F1 generation
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He then crossed two offspring from the F1
generation
3 tall offspring to each 1 short offspring
31 called F2 generation second filial generation
Tall F1
X
Tall F1
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Explanation of his Results
Dominant trait T or tall Recessive trait t
or short
trait is size that is the characteristic
allele is variation of the trait ex. Tall or
short
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Pivotal Concept that Mendel hypothesized..

• Genes are always in pairs

one half of the pair comes from the father
the other half of the pair comes from the mother
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P1 generation TT x tt explained using punnett
squares

• Genotype -
• gene combination of the children
• look at ancestors
• Phenotype
• what is looks like
• use your eyes to detect

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He then crosses 2 F1 ? Tt x Tt
Genotypes - TT, tt, Tt
Phenotypes - 3 tall 1 short
F2 Monohybrid Phenotypic Ratio
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Terms to Know !!!!

• Trait - characteristic
• allele - variation of a trait
• homozygous - 2 genes in the gene pair are the
  same
• heterozygous - 2 genes in the pair are different

• Purebred - homozygous
• hybrid - heterozygus
• genotype - gene combination
• phenotype - what it looks like