patterns of inheritance
- Created by: Dulcieprg
- Created on: 10-06-18 18:31
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- patterns of inheritance
- gregor mendel
- breeding experiments on pea plants
- characteristics determined by units that are inherited
- 20th century realised chromosomesand units work in similar ways
- units 'genes' located on genes
- mid 20th century structure DNA
- why work not recognised in his lifetime?
- monk not scientist at university
- didn't publish book in well known book or journal.
- breeding experiments on pea plants
- modern genetic ideas
- some characteristics controlled by genes.
- gene has different forms called alleles
- individual has 2 alleles for each gene- 1 allele from mother and 1 allele from father
- combination of alleles is called a genotype
- how alleles expressed is called a phenotype e.g green eyes.
- alleles are dominant of recessive
- 2 alleles same=homozygous
- alleles different is heterozygous
- genetic disorders
- polydactyly (having extra fingers or toes) caused by a dominant allele
- cycstic fibrosis (disorder cell membranes) caused by recessive allels
- gregor mendel
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