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MC - Genetics

Multicellular Organisms - Genetics

What is an allele? Different forms of the same gene
What is a phenotype? The physical appearance due to genetic trait
Give an example of a phenotype Blue eyes
What is a genotype? the 2 alleles present e.g. BB or bb or Bb
How many dominant alleles do you need to allow the dominant phenotype to show One
How many recessive alleles do you need to allow the recessive phenotype to show Two
What is homozygous? Two of the same alleles (e.g. BB or bb)
What is heterozygous? Two different alleles (e.g. Bb)
What is polygenic inheritance? Characteristic controlled by more than one gene
Most traits are usually? polygenic and continuous
What are the names for the generations in a family tree? P, F1 and F2
Why are predicted ratios of offspring not always the observed ratio? Fertilisation is a random process.
Created by: StNiniansHS