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Title: Mendel's Law Notes
Description: Notes on Mendel's Law for A Level Biology
Description: Notes on Mendel's Law for A Level Biology
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Mendel\\\\\\\'s Law Notes
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Diseases- Understanding how cells can be controlled
Environmental factors like diet
Gregor Mendel
Laws of Inheritance
Study of alleles (Hereditable Factors)
Discovered genes come in pairs and inherit one from each parent as a
distinct unit
Genes and appearance are known as dominant and recessive traits
Mathematical patterns
Breeding of Garden Peas
Grown in a small area
Self fertile
Large amounts of offspring produced
Pure plants occurred when self pollination happened across many
generations
Able to be artificially cross- pollinated
Particular Inheritance
Physical traits inherited as particles (Mendel)
Mendel didn’t know the particles are chromosomes and DNA
Recessive traits can be because of non-functional dominant traits, due to
mutations
Mendel’s Law
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an apostrophe is assigned
to the 2nd allele to avoid confusion
Two alleles coming together displays phenotype mixing
Codominance
Both alleles are dominant
Heterozygous phenotypes are expressed equally
Capital letters used but are different unlike ‘Incomplete Dominance’
If heterozygote is formed, both traits are shown as phenotypes
Multiple Alleles
Mendel’s Law
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Genes can have more than two alleles
Blood typesA, B, O but only 2 alleles are in someone’s DNA
A and B= codominant but dominant over O allele
O= Recessive
Sex- Linked Traits
Genes on sex chromosomes
Chromosomes are X/Y
XX- Female
XY- Male
Lots of S-L Traits are on the X chromosome
Mendel’s Law
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Title: Mendel's Law Notes
Description: Notes on Mendel's Law for A Level Biology
Description: Notes on Mendel's Law for A Level Biology