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AgEn y2 genetics2
a history of mendel
| Question | Answer |
|---|---|
| in true breeding plants | traits do not change over many generations |
| hybridise means | to cross fertilise two pure breeding varieties |
| genes were originally called | heretable or particulate factors |
| phenotype | physical expression of genotype |
| alleles | two different forms of a gene |
| if plants are pure breeding | the alleles are the same |
| dominant alleles | mask recessive alleles |
| alleles are found on | homologous chromosomes |
| mendels first law | the law of segregation |
| Locus | position of allele on chromosome |
| homozygous | both alleles are the same |
| heterozygous | alleles are different |
| to find out if a gene is homozygous or heterozygous | do a test cross with a double recessive allele |
| mendels second law | law of independent assortment |