Review Words Characteristics – are the category of a trait – Example – eye color, height, likes/dislikes Traits – the physical, social, and emotional qualities of an organism Example – blue eyes, tall, hates carrots Dominant Trait – when a majority of an organism shows the trait. Example – most pea plants show as tall Recessive Trait – when a minority of an organism shows the trait. Example – few pea plants show as short Alleles – all the possible choices for a characteristic Example – eye color – blue, brown, gray, green
Genotype How the genes code for a specific trait. If the trait is dominant it uses a capital letter Example – Tall (T) Ifthe trait is recessive it uses the same letter but lower case Example – short (t) Genotypes always have two letters – one for dad and one for mom
Types of genotype Purebred (homozygous) dominant – the genes only have the dominant trait in its code. Example – Dominant Tall -- TT Purebred (homozygous) recessive – the genes only have the recessive trait in its code. Example – Recessive short – tt Hybrid(heterozygous) – the genes are mixed code for that trait. Example – hybrid Tall -- Tt
PhenotypeThe outward appearance of the trait.How an organism looksHow an organism actsHow an organism feels
Tricks to remembering the differencebetween Genotype and PhenotypeGenotype – deals with GENE CODE.Phenotype – deals with looks you can take a PHOTO with.