lOMoARcPSD|15589855
Mendel, Genes and
Chromosomes
Gregor Mendel
1822 1884
Discoverered principles of heredity using pea plants
How did he do his experiment?
Removed anthers from female parent to prevent self fertilization
Dust pollen from male parent onto the style of the female parent
This is called cross fertilization
The cross fertilised plant produces seeds
Seeds are scored for traits
Seeds are grown into adult plants
Adult plants are scored for traits
What characteristics did mendel study
seed shape
seed colour
flower colour
pod shape
pod colour
stem place
stem size
What did he focus on?
Mendel, Genes and Chromosomes 1
Downloaded by Riley Singh ()
, lOMoARcPSD|15589855
Focused on alternative forms - traits (phenotypes)
what quantitative technique did he use to predict his outcomes
Punnet square
flower colour crossing experiment
What did Mendel deduce?
The trait that 'disappeared' was present but 'masked' by the 'stronger'
allele
Parent carry a pair of genes that govern the inheritance of each trait
If a pair of alleles of a gene consists of different alleles, one is
dominant and the other is recessive
The pairs of alleles segregate in meiosis. Half the gametes carry one
allele. The other half carry the other allele - this is The Principle of
Segregation
Mendel's Principle of Independent assortment
Mendel, Genes and Chromosomes 2
Downloaded by Riley Singh ()
Mendel, Genes and
Chromosomes
Gregor Mendel
1822 1884
Discoverered principles of heredity using pea plants
How did he do his experiment?
Removed anthers from female parent to prevent self fertilization
Dust pollen from male parent onto the style of the female parent
This is called cross fertilization
The cross fertilised plant produces seeds
Seeds are scored for traits
Seeds are grown into adult plants
Adult plants are scored for traits
What characteristics did mendel study
seed shape
seed colour
flower colour
pod shape
pod colour
stem place
stem size
What did he focus on?
Mendel, Genes and Chromosomes 1
Downloaded by Riley Singh ()
, lOMoARcPSD|15589855
Focused on alternative forms - traits (phenotypes)
what quantitative technique did he use to predict his outcomes
Punnet square
flower colour crossing experiment
What did Mendel deduce?
The trait that 'disappeared' was present but 'masked' by the 'stronger'
allele
Parent carry a pair of genes that govern the inheritance of each trait
If a pair of alleles of a gene consists of different alleles, one is
dominant and the other is recessive
The pairs of alleles segregate in meiosis. Half the gametes carry one
allele. The other half carry the other allele - this is The Principle of
Segregation
Mendel's Principle of Independent assortment
Mendel, Genes and Chromosomes 2
Downloaded by Riley Singh ()
